MPEP § 901.05 — Foreign Patent Documents (Annotated Rules)

§901.05 Foreign Patent Documents

USPTO MPEP version: BlueIron's Update: 2026-01-17

This page consolidates and annotates all enforceable requirements under MPEP § 901.05, including statutory authority, regulatory rules, examiner guidance, and practice notes. It is provided as guidance, with links to the ground truth sources. This is information only, it is not legal advice.

Foreign Patent Documents

This section addresses Foreign Patent Documents. Primary authority: 35 U.S.C. 102(a), 35 U.S.C. 102(a)(1), and 35 U.S.C. 102. Contains: 1 requirement, 1 prohibition, 14 permissions, and 14 other statements.

Key Rules

Topic

Patent Application Content

11 rules
StatutoryInformativeAlways
[mpep-901-05-13d52ae86bf5fb9cb43c1e5b]
Specification of Second Application Must Match First
Note:
The specification in the second application must be identical in substance to that of the first, though variations may occur due to language translation or additional/increased/decreased disclosure requirements.

In general, the specification of the second application is identical in substance to the specification of the first. In many instances, the second, if in another language, is simply a translation of the first with perhaps some variation in purely formal parts. But in a minority of cases, the two may not be identical. For instance, sometimes two applications filed in one country are combined into one second application which is filed in another country. Alternatively, a second application could be filed for only part of the disclosure of the priority application. The second application may have the relationship to the first which we refer to as a continuation-in-part (e.g., the second application includes additional subject matter discovered after the first was filed). In some instances, the second application could have its disclosure diminished or increased, to meet the requirements or practices of the second country.

Jump to MPEP SourcePatent Application Content
StatutoryInformativeAlways
[mpep-901-05-2350ce6cac4a8409bc569707]
Translation of First Application Specification
Note:
The second application, if in another language, is typically a translation of the first with minor formal variations.

In general, the specification of the second application is identical in substance to the specification of the first. In many instances, the second, if in another language, is simply a translation of the first with perhaps some variation in purely formal parts. But in a minority of cases, the two may not be identical. For instance, sometimes two applications filed in one country are combined into one second application which is filed in another country. Alternatively, a second application could be filed for only part of the disclosure of the priority application. The second application may have the relationship to the first which we refer to as a continuation-in-part (e.g., the second application includes additional subject matter discovered after the first was filed). In some instances, the second application could have its disclosure diminished or increased, to meet the requirements or practices of the second country.

Jump to MPEP SourcePatent Application Content
StatutoryProhibitedAlways
[mpep-901-05-203c8e3bb68541c83066cf05]
Second Application May Differ From First
Note:
The second application may not be identical to the first, especially if it includes additional subject matter or is filed in a different country with varying requirements.

In general, the specification of the second application is identical in substance to the specification of the first. In many instances, the second, if in another language, is simply a translation of the first with perhaps some variation in purely formal parts. But in a minority of cases, the two may not be identical. For instance, sometimes two applications filed in one country are combined into one second application which is filed in another country. Alternatively, a second application could be filed for only part of the disclosure of the priority application. The second application may have the relationship to the first which we refer to as a continuation-in-part (e.g., the second application includes additional subject matter discovered after the first was filed). In some instances, the second application could have its disclosure diminished or increased, to meet the requirements or practices of the second country.

Jump to MPEP SourcePatent Application Content
StatutoryInformativeAlways
[mpep-901-05-ac6b2c9aecc58794415b056b]
Combining Two Applications into One
Note:
A second application can be filed combining the content of two applications from one country into another, with variations in formal parts or additional subject matter.

In general, the specification of the second application is identical in substance to the specification of the first. In many instances, the second, if in another language, is simply a translation of the first with perhaps some variation in purely formal parts. But in a minority of cases, the two may not be identical. For instance, sometimes two applications filed in one country are combined into one second application which is filed in another country. Alternatively, a second application could be filed for only part of the disclosure of the priority application. The second application may have the relationship to the first which we refer to as a continuation-in-part (e.g., the second application includes additional subject matter discovered after the first was filed). In some instances, the second application could have its disclosure diminished or increased, to meet the requirements or practices of the second country.

Jump to MPEP SourcePatent Application Content
StatutoryInformativeAlways
[mpep-901-05-ae05d78af74f950a1913b2d2]
Second Application for Partial Disclosure Allowed
Note:
A second application can be filed covering only part of the disclosure in a priority application, though it is generally identical to the first.

In general, the specification of the second application is identical in substance to the specification of the first. In many instances, the second, if in another language, is simply a translation of the first with perhaps some variation in purely formal parts. But in a minority of cases, the two may not be identical. For instance, sometimes two applications filed in one country are combined into one second application which is filed in another country. Alternatively, a second application could be filed for only part of the disclosure of the priority application. The second application may have the relationship to the first which we refer to as a continuation-in-part (e.g., the second application includes additional subject matter discovered after the first was filed). In some instances, the second application could have its disclosure diminished or increased, to meet the requirements or practices of the second country.

Jump to MPEP SourcePatent Application Content
StatutoryPermittedAlways
[mpep-901-05-81eb8c1370eb9b083987cfd5]
Second Application Includes Additional Subject Matter
Note:
The second application may include new subject matter discovered after the first application was filed.

In general, the specification of the second application is identical in substance to the specification of the first. In many instances, the second, if in another language, is simply a translation of the first with perhaps some variation in purely formal parts. But in a minority of cases, the two may not be identical. For instance, sometimes two applications filed in one country are combined into one second application which is filed in another country. Alternatively, a second application could be filed for only part of the disclosure of the priority application. The second application may have the relationship to the first which we refer to as a continuation-in-part (e.g., the second application includes additional subject matter discovered after the first was filed). In some instances, the second application could have its disclosure diminished or increased, to meet the requirements or practices of the second country.

Jump to MPEP SourcePatent Application Content
StatutoryInformativeAlways
[mpep-901-05-7ecc45e7a1787d21e5dfe16e]
Disclosure May Be Altered for Second Country
Note:
The disclosure of the second application can be modified to meet the requirements or practices of the country where it is filed.

In general, the specification of the second application is identical in substance to the specification of the first. In many instances, the second, if in another language, is simply a translation of the first with perhaps some variation in purely formal parts. But in a minority of cases, the two may not be identical. For instance, sometimes two applications filed in one country are combined into one second application which is filed in another country. Alternatively, a second application could be filed for only part of the disclosure of the priority application. The second application may have the relationship to the first which we refer to as a continuation-in-part (e.g., the second application includes additional subject matter discovered after the first was filed). In some instances, the second application could have its disclosure diminished or increased, to meet the requirements or practices of the second country.

Jump to MPEP SourcePatent Application Content
StatutoryRequiredAlways
[mpep-901-05-01e95cb8c8670cbc6970fdf3]
Foreign Language Specification as Reference
Note:
Cite a foreign language specification and an English translation if it is later, but content is based on the reference specification.

Duplicate or substantially duplicate versions of a foreign language specification, in English or some other language known to the examiner, can sometimes be found. It is possible to cite a foreign language specification as a reference, while at the same time citing an English language version of the specification with a later date as a convenient translation if the latter is in fact a translation. Questions as to content in such cases must be settled based on the specification which was used as the reference.

Jump to MPEP SourcePatent Application Content
StatutoryPermittedAlways
[mpep-901-05-a19ecdd400601d8970e9b8c6]
Determine U.S. Application Status from Foreign Priority Claim
Note:
This rule allows determining if a U.S. application, claimed as prior by a foreign document, is abandoned, pending, or patented.

If a foreign patent or specification claims the priority of a U.S. application, it can be determined whether the latter is abandoned, still pending, or patented. Even if the U.S. case is or becomes patented, however, the foreign documents may still be useful as supplying an earlier printed publication date.

Jump to MPEP SourcePatent Application ContentPublication Timing (18 Months)Application Publication
StatutoryPermittedAlways
[mpep-901-05-a3c27967b445c9d5ba02d25d]
Check Foreign Application for Earlier Publication
Note:
If a foreign patent claims priority from another country, check that application to determine if the subject matter was patented or published earlier.

If a foreign patent or specification claims the priority of an application in another foreign country, it may sometimes be desirable to check the latter to determine if the subject matter was patented or published at an earlier date. As an example, if a British specification being considered as a reference claims the priority of an application filed in Belgium, it is known at once that a considerably earlier effective date can be established, if needed, because Belgian patents issue soon after filing. In addition, if the application referred to was filed in one of the countries which publish applications in printed form 18 months after filing, the subject matter of the application will be available as a printed publication as of the 18 month publishing date.

Jump to MPEP SourcePatent Application ContentPublication Timing (18 Months)Application Publication
StatutoryPermittedAlways
[mpep-901-05-0792b3d541981da9cdbdbc55]
Earlier Effective Date from Belgian Application
Note:
If a British specification claims priority of a Belgian application, an earlier effective date can be established due to quick issuance of Belgian patents.

If a foreign patent or specification claims the priority of an application in another foreign country, it may sometimes be desirable to check the latter to determine if the subject matter was patented or published at an earlier date. As an example, if a British specification being considered as a reference claims the priority of an application filed in Belgium, it is known at once that a considerably earlier effective date can be established, if needed, because Belgian patents issue soon after filing. In addition, if the application referred to was filed in one of the countries which publish applications in printed form 18 months after filing, the subject matter of the application will be available as a printed publication as of the 18 month publishing date.

Jump to MPEP SourcePatent Application ContentPublication Timing (18 Months)Application Publication
Topic

Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)

8 rules
StatutoryPermittedAlways
[mpep-901-05-f365abab5260b7f0751276a6]
Publication May Take Two Forms
Note:
This rule states that a publication can be laid open for public inspection in certain countries, making the full application available as prior art.

This publication may take either of two forms. In the first form, some countries publish a notice giving certain particulars in their official journal, and thereafter, any one may see the papers at the patent office or order copies. This procedure is referred to as “laying open for public inspection.” There is no printed publication of the specification, although an abstract may be published in printed form. If anyone can inspect or obtain copies of the laid open application, then it is sufficiently accessible to the public to constitute a “publication” within the meaning of pre-AIA 35 U.S.C. 102(a) and 102(b) and 35 U.S.C. 102(a)(1). The full application is thus available as prior art as of either the date of publication of its notice or its laying open to public inspection if this is a later date. See In re Wyer, 655 F.2d 221, 210 USPQ 790 (CCPA 1981). See MPEP § 2127, paragraph III.

Jump to MPEP SourcePre-AIA 102(d) – Foreign Patenting (MPEP 2135)Public Use Under AIA (MPEP 2152.02(c))
StatutoryPermittedAlways
[mpep-901-05-9db275aebaf0b5e452716b1a]
Specification Can Be Inspected at Patent Office After Notice
Note:
Patent specifications can be inspected by the public at the patent office after a notice is published in an official journal, constituting prior art.

This publication may take either of two forms. In the first form, some countries publish a notice giving certain particulars in their official journal, and thereafter, any one may see the papers at the patent office or order copies. This procedure is referred to as “laying open for public inspection.” There is no printed publication of the specification, although an abstract may be published in printed form. If anyone can inspect or obtain copies of the laid open application, then it is sufficiently accessible to the public to constitute a “publication” within the meaning of pre-AIA 35 U.S.C. 102(a) and 102(b) and 35 U.S.C. 102(a)(1). The full application is thus available as prior art as of either the date of publication of its notice or its laying open to public inspection if this is a later date. See In re Wyer, 655 F.2d 221, 210 USPQ 790 (CCPA 1981). See MPEP § 2127, paragraph III.

Jump to MPEP SourcePre-AIA 102(d) – Foreign Patenting (MPEP 2135)Public Use Under AIA (MPEP 2152.02(c))
StatutoryInformativeAlways
[mpep-901-05-c94dee577389db32295a3f29]
Specification Must Be Laid Open to Public Inspection
Note:
The specification must be available for public inspection at the patent office or through official journal publication.

This publication may take either of two forms. In the first form, some countries publish a notice giving certain particulars in their official journal, and thereafter, any one may see the papers at the patent office or order copies. This procedure is referred to as “laying open for public inspection.” There is no printed publication of the specification, although an abstract may be published in printed form. If anyone can inspect or obtain copies of the laid open application, then it is sufficiently accessible to the public to constitute a “publication” within the meaning of pre-AIA 35 U.S.C. 102(a) and 102(b) and 35 U.S.C. 102(a)(1). The full application is thus available as prior art as of either the date of publication of its notice or its laying open to public inspection if this is a later date. See In re Wyer, 655 F.2d 221, 210 USPQ 790 (CCPA 1981). See MPEP § 2127, paragraph III.

Jump to MPEP SourcePre-AIA 102(d) – Foreign Patenting (MPEP 2135)Public Use Under AIA (MPEP 2152.02(c))
StatutoryInformativeAlways
[mpep-901-05-bf2f78fa3d0e9c650c7ef1b0]
Specification Available for Public Inspection
Note:
The full application is available as prior art if it is laid open for public inspection, even without a printed publication of the specification.

This publication may take either of two forms. In the first form, some countries publish a notice giving certain particulars in their official journal, and thereafter, any one may see the papers at the patent office or order copies. This procedure is referred to as “laying open for public inspection.” There is no printed publication of the specification, although an abstract may be published in printed form. If anyone can inspect or obtain copies of the laid open application, then it is sufficiently accessible to the public to constitute a “publication” within the meaning of pre-AIA 35 U.S.C. 102(a) and 102(b) and 35 U.S.C. 102(a)(1). The full application is thus available as prior art as of either the date of publication of its notice or its laying open to public inspection if this is a later date. See In re Wyer, 655 F.2d 221, 210 USPQ 790 (CCPA 1981). See MPEP § 2127, paragraph III.

Jump to MPEP SourcePre-AIA 102(d) – Foreign Patenting (MPEP 2135)Public Use Under AIA (MPEP 2152.02(c))
StatutoryPermittedAlways
[mpep-901-05-89142204a3010cd739c9b2a3]
Application Laying Open Requirement
Note:
The application must be laid open by publishing a notice in the official journal, making it available for public inspection and obtaining copies.

The publication for opposition may take the form of a laying open of the application by the publication of a notice in the official journal with the application being then open to public inspection and the obtaining of copies. Otherwise, publication occurs by the issue of the applications in printed form. Either way, these published documents constitute printed publications which are available as references under pre-AIA 35 U.S.C. 102(a) and 102(b) and 35 U.S.C. 102(a)(1).

Jump to MPEP SourcePre-AIA 102(d) – Foreign Patenting (MPEP 2135)Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
StatutoryInformativeAlways
[mpep-901-05-5a79aa72d5dbeae8557b98e2]
Publication Occurs by Printed Application Issue
Note:
This rule states that publication for opposition occurs through the issuance of applications in printed form, either laying them open in the official journal or making them available for public inspection.

The publication for opposition may take the form of a laying open of the application by the publication of a notice in the official journal with the application being then open to public inspection and the obtaining of copies. Otherwise, publication occurs by the issue of the applications in printed form. Either way, these published documents constitute printed publications which are available as references under pre-AIA 35 U.S.C. 102(a) and 102(b) and 35 U.S.C. 102(a)(1).

Jump to MPEP SourcePre-AIA 102(d) – Foreign Patenting (MPEP 2135)Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
StatutoryPermittedAlways
[mpep-901-05-4eb03a0247993ecc2debb0f3]
Examiner Must Identify Earliest Related Document
Note:
The examiner must locate the earliest published document within a related group and verify if it contains earlier disclosure before rejecting claims.

Each horizontal row of boxes contains information on one or more distinct patent documents from a specified country available as a reference under pre-AIA 35 U.S.C. 102(a) and 102(b) or 35 U.S.C. 102(a)(1). If several distinct patent documents are included within a common box of a row, these documents are related to each other and are merely separate documents published at different stages of the same invention’s patenting process. Usually, this related group of documents includes a published application which ripens into an issued patent. Within each box of the second column of each row, the top listed document of a related group is the one that is “published” first (e.g., made available for public inspection by laying open application, or application printed and disseminated to the public). Once an examiner determines the country or organization publishing the documents, the name of the document can be located in the second column of the table and the examiner can determine if a document from the related group containing the same or similar disclosure having an earlier date is available as a reference. Usually, the documents within a related group have identical disclosures; sometimes, however, there are differences in the claims or minor differences in the specification. Therefore, examiners should always verify that the earlier related document also includes the subject matter necessary for the rejection. Some countries issue more than one type of patent and for clarity, in these situations, separate rows are provided for each type.

Jump to MPEP SourcePre-AIA 102(d) – Foreign Patenting (MPEP 2135)Access to Patent File Wrapper
StatutoryInformativeAlways
[mpep-901-05-b29c18d3b5c3f91af59323fc]
Separate Rows for Different Patent Types
Note:
When a country issues multiple types of patents, separate rows are provided to clearly distinguish between them.

Each horizontal row of boxes contains information on one or more distinct patent documents from a specified country available as a reference under pre-AIA 35 U.S.C. 102(a) and 102(b) or 35 U.S.C. 102(a)(1). If several distinct patent documents are included within a common box of a row, these documents are related to each other and are merely separate documents published at different stages of the same invention’s patenting process. Usually, this related group of documents includes a published application which ripens into an issued patent. Within each box of the second column of each row, the top listed document of a related group is the one that is “published” first (e.g., made available for public inspection by laying open application, or application printed and disseminated to the public). Once an examiner determines the country or organization publishing the documents, the name of the document can be located in the second column of the table and the examiner can determine if a document from the related group containing the same or similar disclosure having an earlier date is available as a reference. Usually, the documents within a related group have identical disclosures; sometimes, however, there are differences in the claims or minor differences in the specification. Therefore, examiners should always verify that the earlier related document also includes the subject matter necessary for the rejection. Some countries issue more than one type of patent and for clarity, in these situations, separate rows are provided for each type.

Jump to MPEP SourcePre-AIA 102(d) – Foreign Patenting (MPEP 2135)Access to Patent File Wrapper
Topic

Global Dossier Access

8 rules
StatutoryInformativeAlways
[mpep-901-05-767974bd979745fa550a2083]
Search for Foreign Patents Can Be Laborious
Note:
Examiners must be prepared to conduct thorough and time-consuming searches for foreign patents, especially in countries where the process is more complex.

The determination of whether a foreign patent has been issued or the application published is a comparatively simple matter for some countries, but for some it is quite laborious and time-consuming. Sources for this data which are not maintained by the Office do exist and can be utilized for locating corresponding patents. Two possible sources are the Derwent World Patents Index (DWPI) produced by Thomson Reuters, and the International Patent Documentation Center (INPADOC), which is produced by the European Patent Office. Additionally, Chemical Abstracts Service (CAS) publishes abstracts of patents in the chemical arts from a large number of countries. Only one patent or published specification from a family is abstracted in full and any related family members issued or published are cross-referenced. Chemical Abstracts are available online via commercial databases or via Microfilm/CD-ROM in the Main Scientific and Technical Information Center (STIC). To get access to Chemical Abstracts online, examiners should contact their SPE for approval and email the STIC-ERC mailbox. The microfilm collection is available from 1907-1987; and the CD-ROM collection is available from 1987-2011. The coverage is for approximately 83 journals, with the oldest content dating from 1859. Examiners may also utilize the Global Dossier Public Access which provides online access to the file histories of related applications from participating IP Offices. This includes all international applications filed under the Patent Cooperation Treaty (PCT) as well as patent applications from World Intellectual Property Organization-Centralized Access to Search and Examination (WIPO-CASE) participating offices. See MPEP § 901.08 for additional information. See also www.wipo.int/case/en/ for additional information regarding WIPO-CASE.

Jump to MPEP SourceGlobal Dossier AccessSearch in National StageElectronic Access Systems
StatutoryPermittedAlways
[mpep-901-05-aad0a39b77e08708dc28262d]
Non-Office Sources for Finding Patents Exist
Note:
Examiners can use Derwent World Patents Index, INPADOC, and Chemical Abstracts Service to locate corresponding patents not maintained by the Office.

The determination of whether a foreign patent has been issued or the application published is a comparatively simple matter for some countries, but for some it is quite laborious and time-consuming. Sources for this data which are not maintained by the Office do exist and can be utilized for locating corresponding patents. Two possible sources are the Derwent World Patents Index (DWPI) produced by Thomson Reuters, and the International Patent Documentation Center (INPADOC), which is produced by the European Patent Office. Additionally, Chemical Abstracts Service (CAS) publishes abstracts of patents in the chemical arts from a large number of countries. Only one patent or published specification from a family is abstracted in full and any related family members issued or published are cross-referenced. Chemical Abstracts are available online via commercial databases or via Microfilm/CD-ROM in the Main Scientific and Technical Information Center (STIC). To get access to Chemical Abstracts online, examiners should contact their SPE for approval and email the STIC-ERC mailbox. The microfilm collection is available from 1907-1987; and the CD-ROM collection is available from 1987-2011. The coverage is for approximately 83 journals, with the oldest content dating from 1859. Examiners may also utilize the Global Dossier Public Access which provides online access to the file histories of related applications from participating IP Offices. This includes all international applications filed under the Patent Cooperation Treaty (PCT) as well as patent applications from World Intellectual Property Organization-Centralized Access to Search and Examination (WIPO-CASE) participating offices. See MPEP § 901.08 for additional information. See also www.wipo.int/case/en/ for additional information regarding WIPO-CASE.

Jump to MPEP SourceGlobal Dossier AccessSearch in National StageElectronic Access Systems
StatutoryInformativeAlways
[mpep-901-05-aefafd2326796927e09364f0]
Sources for Locating Corresponding Patents
Note:
Examiners can use Derwent World Patents Index, INPADOC, and Chemical Abstracts Service to locate corresponding foreign patents.

The determination of whether a foreign patent has been issued or the application published is a comparatively simple matter for some countries, but for some it is quite laborious and time-consuming. Sources for this data which are not maintained by the Office do exist and can be utilized for locating corresponding patents. Two possible sources are the Derwent World Patents Index (DWPI) produced by Thomson Reuters, and the International Patent Documentation Center (INPADOC), which is produced by the European Patent Office. Additionally, Chemical Abstracts Service (CAS) publishes abstracts of patents in the chemical arts from a large number of countries. Only one patent or published specification from a family is abstracted in full and any related family members issued or published are cross-referenced. Chemical Abstracts are available online via commercial databases or via Microfilm/CD-ROM in the Main Scientific and Technical Information Center (STIC). To get access to Chemical Abstracts online, examiners should contact their SPE for approval and email the STIC-ERC mailbox. The microfilm collection is available from 1907-1987; and the CD-ROM collection is available from 1987-2011. The coverage is for approximately 83 journals, with the oldest content dating from 1859. Examiners may also utilize the Global Dossier Public Access which provides online access to the file histories of related applications from participating IP Offices. This includes all international applications filed under the Patent Cooperation Treaty (PCT) as well as patent applications from World Intellectual Property Organization-Centralized Access to Search and Examination (WIPO-CASE) participating offices. See MPEP § 901.08 for additional information. See also www.wipo.int/case/en/ for additional information regarding WIPO-CASE.

Jump to MPEP SourceGlobal Dossier AccessSearch in National StageElectronic Access Systems
StatutoryInformativeAlways
[mpep-901-05-2a408a5095c1af5aa6598d2d]
Only One Patent from Family Abstracted
Note:
This rule requires that only one patent or published specification from a family be abstracted in full, while any related issued or published family members must be cross-referenced.

The determination of whether a foreign patent has been issued or the application published is a comparatively simple matter for some countries, but for some it is quite laborious and time-consuming. Sources for this data which are not maintained by the Office do exist and can be utilized for locating corresponding patents. Two possible sources are the Derwent World Patents Index (DWPI) produced by Thomson Reuters, and the International Patent Documentation Center (INPADOC), which is produced by the European Patent Office. Additionally, Chemical Abstracts Service (CAS) publishes abstracts of patents in the chemical arts from a large number of countries. Only one patent or published specification from a family is abstracted in full and any related family members issued or published are cross-referenced. Chemical Abstracts are available online via commercial databases or via Microfilm/CD-ROM in the Main Scientific and Technical Information Center (STIC). To get access to Chemical Abstracts online, examiners should contact their SPE for approval and email the STIC-ERC mailbox. The microfilm collection is available from 1907-1987; and the CD-ROM collection is available from 1987-2011. The coverage is for approximately 83 journals, with the oldest content dating from 1859. Examiners may also utilize the Global Dossier Public Access which provides online access to the file histories of related applications from participating IP Offices. This includes all international applications filed under the Patent Cooperation Treaty (PCT) as well as patent applications from World Intellectual Property Organization-Centralized Access to Search and Examination (WIPO-CASE) participating offices. See MPEP § 901.08 for additional information. See also www.wipo.int/case/en/ for additional information regarding WIPO-CASE.

Jump to MPEP SourceGlobal Dossier AccessSearch in National StageElectronic Access Systems
StatutoryInformativeAlways
[mpep-901-05-32c2e739a6e6e9e5e1f161f2]
Access to Chemical Abstracts via STIC
Note:
Examiners must contact their SPE for approval and use the STIC-ERC mailbox to access Chemical Abstracts online or through microfilm/CD-ROM collections at STIC.

The determination of whether a foreign patent has been issued or the application published is a comparatively simple matter for some countries, but for some it is quite laborious and time-consuming. Sources for this data which are not maintained by the Office do exist and can be utilized for locating corresponding patents. Two possible sources are the Derwent World Patents Index (DWPI) produced by Thomson Reuters, and the International Patent Documentation Center (INPADOC), which is produced by the European Patent Office. Additionally, Chemical Abstracts Service (CAS) publishes abstracts of patents in the chemical arts from a large number of countries. Only one patent or published specification from a family is abstracted in full and any related family members issued or published are cross-referenced. Chemical Abstracts are available online via commercial databases or via Microfilm/CD-ROM in the Main Scientific and Technical Information Center (STIC). To get access to Chemical Abstracts online, examiners should contact their SPE for approval and email the STIC-ERC mailbox. The microfilm collection is available from 1907-1987; and the CD-ROM collection is available from 1987-2011. The coverage is for approximately 83 journals, with the oldest content dating from 1859. Examiners may also utilize the Global Dossier Public Access which provides online access to the file histories of related applications from participating IP Offices. This includes all international applications filed under the Patent Cooperation Treaty (PCT) as well as patent applications from World Intellectual Property Organization-Centralized Access to Search and Examination (WIPO-CASE) participating offices. See MPEP § 901.08 for additional information. See also www.wipo.int/case/en/ for additional information regarding WIPO-CASE.

Jump to MPEP SourceGlobal Dossier AccessSearch in National StageElectronic Access Systems
StatutoryInformativeAlways
[mpep-901-05-6a4ab39b879e3c87498ce2ee]
Microfilm and CD-ROM Collection for Chemical Abstracts
Note:
Examiners can access Chemical Abstracts from 1907 to 2011 via microfilm or CD-ROM, with coverage of approximately 83 journals dating back to 1859.

The determination of whether a foreign patent has been issued or the application published is a comparatively simple matter for some countries, but for some it is quite laborious and time-consuming. Sources for this data which are not maintained by the Office do exist and can be utilized for locating corresponding patents. Two possible sources are the Derwent World Patents Index (DWPI) produced by Thomson Reuters, and the International Patent Documentation Center (INPADOC), which is produced by the European Patent Office. Additionally, Chemical Abstracts Service (CAS) publishes abstracts of patents in the chemical arts from a large number of countries. Only one patent or published specification from a family is abstracted in full and any related family members issued or published are cross-referenced. Chemical Abstracts are available online via commercial databases or via Microfilm/CD-ROM in the Main Scientific and Technical Information Center (STIC). To get access to Chemical Abstracts online, examiners should contact their SPE for approval and email the STIC-ERC mailbox. The microfilm collection is available from 1907-1987; and the CD-ROM collection is available from 1987-2011. The coverage is for approximately 83 journals, with the oldest content dating from 1859. Examiners may also utilize the Global Dossier Public Access which provides online access to the file histories of related applications from participating IP Offices. This includes all international applications filed under the Patent Cooperation Treaty (PCT) as well as patent applications from World Intellectual Property Organization-Centralized Access to Search and Examination (WIPO-CASE) participating offices. See MPEP § 901.08 for additional information. See also www.wipo.int/case/en/ for additional information regarding WIPO-CASE.

Jump to MPEP SourceGlobal Dossier AccessSearch in National StageElectronic Access Systems
StatutoryInformativeAlways
[mpep-901-05-7d4984a61376c8a2465bb7a4]
Access to International Patent File Histories Required
Note:
Examiners must access file histories of related applications from participating IP Offices through Global Dossier Public Access.

The determination of whether a foreign patent has been issued or the application published is a comparatively simple matter for some countries, but for some it is quite laborious and time-consuming. Sources for this data which are not maintained by the Office do exist and can be utilized for locating corresponding patents. Two possible sources are the Derwent World Patents Index (DWPI) produced by Thomson Reuters, and the International Patent Documentation Center (INPADOC), which is produced by the European Patent Office. Additionally, Chemical Abstracts Service (CAS) publishes abstracts of patents in the chemical arts from a large number of countries. Only one patent or published specification from a family is abstracted in full and any related family members issued or published are cross-referenced. Chemical Abstracts are available online via commercial databases or via Microfilm/CD-ROM in the Main Scientific and Technical Information Center (STIC). To get access to Chemical Abstracts online, examiners should contact their SPE for approval and email the STIC-ERC mailbox. The microfilm collection is available from 1907-1987; and the CD-ROM collection is available from 1987-2011. The coverage is for approximately 83 journals, with the oldest content dating from 1859. Examiners may also utilize the Global Dossier Public Access which provides online access to the file histories of related applications from participating IP Offices. This includes all international applications filed under the Patent Cooperation Treaty (PCT) as well as patent applications from World Intellectual Property Organization-Centralized Access to Search and Examination (WIPO-CASE) participating offices. See MPEP § 901.08 for additional information. See also www.wipo.int/case/en/ for additional information regarding WIPO-CASE.

Jump to MPEP SourceGlobal Dossier AccessSearch in National StageElectronic Access Systems
StatutoryPermittedAlways
[mpep-901-05-92913dc5e4055cc421f9a9be]
Examiners Can Use Global Dossier Public Access
Note:
Examiners are permitted to access file histories of related applications from participating IP offices through the Global Dossier Public Access, including PCT and WIPO-CASE applications.

The determination of whether a foreign patent has been issued or the application published is a comparatively simple matter for some countries, but for some it is quite laborious and time-consuming. Sources for this data which are not maintained by the Office do exist and can be utilized for locating corresponding patents. Two possible sources are the Derwent World Patents Index (DWPI) produced by Thomson Reuters, and the International Patent Documentation Center (INPADOC), which is produced by the European Patent Office. Additionally, Chemical Abstracts Service (CAS) publishes abstracts of patents in the chemical arts from a large number of countries. Only one patent or published specification from a family is abstracted in full and any related family members issued or published are cross-referenced. Chemical Abstracts are available online via commercial databases or via Microfilm/CD-ROM in the Main Scientific and Technical Information Center (STIC). To get access to Chemical Abstracts online, examiners should contact their SPE for approval and email the STIC-ERC mailbox. The microfilm collection is available from 1907-1987; and the CD-ROM collection is available from 1987-2011. The coverage is for approximately 83 journals, with the oldest content dating from 1859. Examiners may also utilize the Global Dossier Public Access which provides online access to the file histories of related applications from participating IP Offices. This includes all international applications filed under the Patent Cooperation Treaty (PCT) as well as patent applications from World Intellectual Property Organization-Centralized Access to Search and Examination (WIPO-CASE) participating offices. See MPEP § 901.08 for additional information. See also www.wipo.int/case/en/ for additional information regarding WIPO-CASE.

Jump to MPEP SourceGlobal Dossier AccessSearch in National StageElectronic Access Systems
Topic

PTAB Contested Case Procedures

6 rules
StatutoryInformativeAlways
[mpep-901-05-022676ec1b32b75c16ffa409]
Public Can Oppose Patent Grant
Note:
Patents can be opposed by the public during a specified period after an application is deemed allowable.

Some examining countries consider participation by the public an inherent feature of their examining system. When an application is found to be allowable by the examiner, it is “published” for opposition. Then there is a period, usually 3 or 4 months, within which members of the public can oppose the grant of the patent. In some countries, the opposing party can be any person or company. In other countries, only those parties who are affected by the outcome can participate in the opposition. The opposition is an inter partes proceeding and the opposing party can ordinarily raise any ground on the basis of which a patent would be refused or held invalid, including any applicable references.

Jump to MPEP SourcePTAB Contested Case Procedures
StatutoryInformativeAlways
[mpep-901-05-c7cf9deb3d0d822a2a531acf]
Application Allowance Requires Public Notice Period
Note:
When an application is found to be allowable, it must be published for a public opposition period of usually 3-4 months before patent grant.

Some examining countries consider participation by the public an inherent feature of their examining system. When an application is found to be allowable by the examiner, it is “published” for opposition. Then there is a period, usually 3 or 4 months, within which members of the public can oppose the grant of the patent. In some countries, the opposing party can be any person or company. In other countries, only those parties who are affected by the outcome can participate in the opposition. The opposition is an inter partes proceeding and the opposing party can ordinarily raise any ground on the basis of which a patent would be refused or held invalid, including any applicable references.

Jump to MPEP SourcePTAB Contested Case Procedures
StatutoryPermittedAlways
[mpep-901-05-f2f212a2f736541a4e0521f4]
Public Can Oppose Patent Grant Within 3-4 Months
Note:
Members of the public have up to 3 or 4 months to oppose a patent grant after it is published for examination.

Some examining countries consider participation by the public an inherent feature of their examining system. When an application is found to be allowable by the examiner, it is “published” for opposition. Then there is a period, usually 3 or 4 months, within which members of the public can oppose the grant of the patent. In some countries, the opposing party can be any person or company. In other countries, only those parties who are affected by the outcome can participate in the opposition. The opposition is an inter partes proceeding and the opposing party can ordinarily raise any ground on the basis of which a patent would be refused or held invalid, including any applicable references.

Jump to MPEP SourcePTAB Contested Case Procedures
StatutoryPermittedAlways
[mpep-901-05-095e3e00cf678343b7ab0733]
Any Person Can Oppose Patent Grant
Note:
In some countries, anyone can oppose a patent grant during the opposition period after publication of an allowable application.

Some examining countries consider participation by the public an inherent feature of their examining system. When an application is found to be allowable by the examiner, it is “published” for opposition. Then there is a period, usually 3 or 4 months, within which members of the public can oppose the grant of the patent. In some countries, the opposing party can be any person or company. In other countries, only those parties who are affected by the outcome can participate in the opposition. The opposition is an inter partes proceeding and the opposing party can ordinarily raise any ground on the basis of which a patent would be refused or held invalid, including any applicable references.

Jump to MPEP SourcePTAB Contested Case Procedures
StatutoryPermittedAlways
[mpep-901-05-4c9e206dbe4761912becc2b2]
Only Affected Parties Can Oppose Grant of Patent
Note:
Parties opposing the grant of a patent can only be those directly affected by the outcome.

Some examining countries consider participation by the public an inherent feature of their examining system. When an application is found to be allowable by the examiner, it is “published” for opposition. Then there is a period, usually 3 or 4 months, within which members of the public can oppose the grant of the patent. In some countries, the opposing party can be any person or company. In other countries, only those parties who are affected by the outcome can participate in the opposition. The opposition is an inter partes proceeding and the opposing party can ordinarily raise any ground on the basis of which a patent would be refused or held invalid, including any applicable references.

Jump to MPEP SourcePTAB Contested Case Procedures
StatutoryPermittedAlways
[mpep-901-05-6a9de92f924a60308a0506ec]
Public Can Oppose Patent Grant Based on Invalidity Grounds
Note:
The opposing party in a patent opposition can raise any ground for invalidating the patent, including applicable references.

Some examining countries consider participation by the public an inherent feature of their examining system. When an application is found to be allowable by the examiner, it is “published” for opposition. Then there is a period, usually 3 or 4 months, within which members of the public can oppose the grant of the patent. In some countries, the opposing party can be any person or company. In other countries, only those parties who are affected by the outcome can participate in the opposition. The opposition is an inter partes proceeding and the opposing party can ordinarily raise any ground on the basis of which a patent would be refused or held invalid, including any applicable references.

Jump to MPEP SourcePTAB Contested Case Procedures
Topic

35 U.S.C. 102 – Novelty / Prior Art

4 rules
StatutoryInformativeAlways
[mpep-901-05-c5496dc3dd7cb1e2e63dbeef]
Varying Patent Grant Practices Worldwide
Note:
Different countries use various methods to grant patents, such as issuing letters patent or having an examiner sign the document.

Practices and terminology vary worldwide regarding patents. In some countries, there is no “letters patent” document which creates and grants the rights. In other countries, the examiner grants the patent by signing the required paper. In a few countries, the patent is granted by operation of law after certain events have occurred. The term “granting the patent” is used here for convenience, but it should be noted that 35 U.S.C. 102(a) and 102(b) or 35 U.S.C. 102(a)(1) do not use this terminology.

Jump to MPEP SourceNovelty / Prior ArtSignature Requirements
StatutoryInformativeAlways
[mpep-901-05-d5a60e95c56782e0deebceb1]
No Letters Patent for Some Countries
Note:
In certain countries, patents are granted without a formal letters patent document; instead, they are granted by other means such as examiner signatures or legal operations.

Practices and terminology vary worldwide regarding patents. In some countries, there is no “letters patent” document which creates and grants the rights. In other countries, the examiner grants the patent by signing the required paper. In a few countries, the patent is granted by operation of law after certain events have occurred. The term “granting the patent” is used here for convenience, but it should be noted that 35 U.S.C. 102(a) and 102(b) or 35 U.S.C. 102(a)(1) do not use this terminology.

Jump to MPEP SourceNovelty / Prior ArtSignature Requirements
StatutoryInformativeAlways
[mpep-901-05-c77af0e83f649c482bdf12c7]
Grant of Patent by Operation of Law After Events
Note:
In a few countries, patents are automatically granted after certain events occur without an explicit document.

Practices and terminology vary worldwide regarding patents. In some countries, there is no “letters patent” document which creates and grants the rights. In other countries, the examiner grants the patent by signing the required paper. In a few countries, the patent is granted by operation of law after certain events have occurred. The term “granting the patent” is used here for convenience, but it should be noted that 35 U.S.C. 102(a) and 102(b) or 35 U.S.C. 102(a)(1) do not use this terminology.

Jump to MPEP SourceNovelty / Prior ArtSignature Requirements
StatutoryRecommendedAlways
[mpep-901-05-f1c3edfd6aec3c91f4e18743]
Patent Grant Terminology Clarification
Note:
Clarifies that 'granting the patent' is a convenient term, but not used in 35 U.S.C. 102(a) or (b).

Practices and terminology vary worldwide regarding patents. In some countries, there is no “letters patent” document which creates and grants the rights. In other countries, the examiner grants the patent by signing the required paper. In a few countries, the patent is granted by operation of law after certain events have occurred. The term “granting the patent” is used here for convenience, but it should be noted that 35 U.S.C. 102(a) and 102(b) or 35 U.S.C. 102(a)(1) do not use this terminology.

Jump to MPEP SourceNovelty / Prior ArtSignature Requirements
Topic

Patent Grant and Document Format

4 rules
MPEP GuidanceInformativeAlways
[mpep-901-05-d139cfee9c0390347db7a701]
Foreign Patents Available to U.S. Examiners
Note:
All foreign patents, published applications, and summaries disseminated publicly are accessible to U.S. examiners for review.

All foreign patents, published applications, and any other published derivative material containing portions or summaries of the contents of published or unpublished patents (e.g., abstracts) which have been disseminated to the public are available to U.S. examiners. See MPEP §§ 901.06(a), paragraphs I.C. and IV.C and 901.08. In general, a foreign patent, the contents of its application, or segments of its content should not be cited as a reference until its date of patenting or its public availability date (e.g., publication date) can be confirmed by an examiner’s review of a copy of the document. Examiners should remember that in some countries, there is a delay between the date of the patent grant and the date of publication.

Jump to MPEP SourcePatent Grant and Document FormatPatent Issue and Publication
MPEP GuidanceRecommendedAlways
[mpep-901-05-33ee4c66189a31fb231dda7a]
Citation of Foreign Patents Must Be Confirmed
Note:
Examiners must confirm the patenting or publication date before citing foreign patents as references.

All foreign patents, published applications, and any other published derivative material containing portions or summaries of the contents of published or unpublished patents (e.g., abstracts) which have been disseminated to the public are available to U.S. examiners. See MPEP §§ 901.06(a), paragraphs I.C. and IV.C and 901.08. In general, a foreign patent, the contents of its application, or segments of its content should not be cited as a reference until its date of patenting or its public availability date (e.g., publication date) can be confirmed by an examiner’s review of a copy of the document. Examiners should remember that in some countries, there is a delay between the date of the patent grant and the date of publication.

Jump to MPEP SourcePatent Grant and Document FormatPatent Issue and Publication
MPEP GuidanceRecommendedAlways
[mpep-901-05-1e2bb2988da7e7f73e6a364f]
Patent Publication Delay Requirement
Note:
Examiners must consider the delay between patent grant and publication in foreign countries when evaluating references.

All foreign patents, published applications, and any other published derivative material containing portions or summaries of the contents of published or unpublished patents (e.g., abstracts) which have been disseminated to the public are available to U.S. examiners. See MPEP §§ 901.06(a), paragraphs I.C. and IV.C and 901.08. In general, a foreign patent, the contents of its application, or segments of its content should not be cited as a reference until its date of patenting or its public availability date (e.g., publication date) can be confirmed by an examiner’s review of a copy of the document. Examiners should remember that in some countries, there is a delay between the date of the patent grant and the date of publication.

Jump to MPEP SourcePatent Grant and Document FormatPatent Issue and Publication
MPEP GuidancePermittedAlways
[mpep-901-05-655ee14e9ca1621431816fc9]
Confidentiality Until Patent Grant or Specified Date
Note:
Pending patent applications must remain confidential until the grant of a patent or until 18 months after filing, as specified by law.

In general, pending applications are confidential until a certain stage in the proceedings (e.g., upon patent grant), or until a certain date (e.g., 18 months after filing), as may be specified in a particular law.

Jump to MPEP SourcePatent Grant and Document FormatPatent Issue and Publication
Topic

Derivation Proceedings (AIA)

4 rules
MPEP GuidancePermittedAlways
[mpep-901-05-d60b2c40c471a9ac45089e1e]
Owner Can Apply for Patent
Note:
In most countries, the owner of prospective rights derived from an inventor can apply for a patent in their own name; in some countries, other persons may also be coapplicants.

In most countries, the owner of the prospective rights, derived from the inventor, may also apply for a patent in the owner’s name as applicant; in a few, other persons may apply as well or be joined as coapplicants. Hence, applicant is not synonymous with inventor, and the applicant may be a company. Some countries require the inventors’ names to be given and regularly print them on the published copies. Other countries may sometimes print the inventors’ names only when available or when requested to do so.

Jump to MPEP SourceDerivation Proceedings (AIA)
MPEP GuidancePermittedAlways
[mpep-901-05-52a1b4da529cdc80a3730b64]
Applicant vs Inventor Distinction
Note:
The applicant for a patent does not have to be the inventor and can be a company.

In most countries, the owner of the prospective rights, derived from the inventor, may also apply for a patent in the owner’s name as applicant; in a few, other persons may apply as well or be joined as coapplicants. Hence, applicant is not synonymous with inventor, and the applicant may be a company. Some countries require the inventors’ names to be given and regularly print them on the published copies. Other countries may sometimes print the inventors’ names only when available or when requested to do so.

Jump to MPEP SourceDerivation Proceedings (AIA)
MPEP GuidanceInformativeAlways
[mpep-901-05-fa2bbcb6a20f6793b2c30ede]
Inventors’ Names Must Be Printed on Published Copies in Some Countries
Note:
Some countries require the inventors’ names to be given and regularly printed on published copies of patents.

In most countries, the owner of the prospective rights, derived from the inventor, may also apply for a patent in the owner’s name as applicant; in a few, other persons may apply as well or be joined as coapplicants. Hence, applicant is not synonymous with inventor, and the applicant may be a company. Some countries require the inventors’ names to be given and regularly print them on the published copies. Other countries may sometimes print the inventors’ names only when available or when requested to do so.

Jump to MPEP SourceDerivation Proceedings (AIA)
MPEP GuidancePermittedAlways
[mpep-901-05-ac234086957d248cebea859e]
Inventors' Names May Be Printed When Available Or Requested
Note:
Countries may print the inventors’ names on patent documents when they are available or when requested, but not always.

In most countries, the owner of the prospective rights, derived from the inventor, may also apply for a patent in the owner’s name as applicant; in a few, other persons may apply as well or be joined as coapplicants. Hence, applicant is not synonymous with inventor, and the applicant may be a company. Some countries require the inventors’ names to be given and regularly print them on the published copies. Other countries may sometimes print the inventors’ names only when available or when requested to do so.

Jump to MPEP SourceDerivation Proceedings (AIA)
Topic

AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)

3 rules
StatutoryPermittedAlways
[mpep-901-05-f8de90b33391fea18546f4fb]
Determining Foreign Application Publication for Pre-AIA 102 References
Note:
When a U.S. patent or published application is used as a reference under pre-AIA 35 U.S.C. 102 and claims foreign priority, check if the foreign application has issued or been published before using its filing date.

If a U.S. patent or U.S. published application being considered as a reference in an application subject to pre-AIA 35 U.S.C. 102 claims the priority of a previously filed foreign application, it may be desirable to determine if the foreign application has issued or has been published, to see if there is an earlier date. For example, it has occurred that an examiner rejected claims on the basis of a U.S. patent and the applicant filed affidavits to overcome the filing date of the reference; the affidavits were controversial and the case went to appeal, with an extensive brief and an examiner’s answer having been filed. After all this work, somebody noticed that the U.S. patent reference claimed the priority of a foreign application filed in a country in which patents were issued fairly soon, checked the foreign application, and discovered that the foreign patent had not only been issued, but also published in printed form, more than 1 year prior to the filing date of the application on appeal. If a U.S. patent or U.S. published application is being considered as a reference in an application subject to 35 U.S.C. 102, whether the filing date of the foreign priority application claimed in the reference can be used as the “effectively filed date” under 35 U.S.C. 102(a)(2) is determined by 35 U.S.C. 102(d). See MPEP § 2154.01(b).

Jump to MPEP SourceAIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)Pre-AIA 102(e) – Earlier US Applications (MPEP 2136)Published Application as Prior Art
StatutoryInformativeAlways
[mpep-901-05-1b7bed8e64a0190339479d17]
Foreign Patent Issued Before U.S. Reference Filing Date
Note:
If a U.S. patent or published application is used as a reference, check if the foreign priority application was issued or published before the filing date of the appeal.

If a U.S. patent or U.S. published application being considered as a reference in an application subject to pre-AIA 35 U.S.C. 102 claims the priority of a previously filed foreign application, it may be desirable to determine if the foreign application has issued or has been published, to see if there is an earlier date. For example, it has occurred that an examiner rejected claims on the basis of a U.S. patent and the applicant filed affidavits to overcome the filing date of the reference; the affidavits were controversial and the case went to appeal, with an extensive brief and an examiner’s answer having been filed. After all this work, somebody noticed that the U.S. patent reference claimed the priority of a foreign application filed in a country in which patents were issued fairly soon, checked the foreign application, and discovered that the foreign patent had not only been issued, but also published in printed form, more than 1 year prior to the filing date of the application on appeal. If a U.S. patent or U.S. published application is being considered as a reference in an application subject to 35 U.S.C. 102, whether the filing date of the foreign priority application claimed in the reference can be used as the “effectively filed date” under 35 U.S.C. 102(a)(2) is determined by 35 U.S.C. 102(d). See MPEP § 2154.01(b).

Jump to MPEP SourceAIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)Pre-AIA 102(e) – Earlier US Applications (MPEP 2136)
StatutoryPermittedAlways
[mpep-901-05-4eb909cbebb626b14ca99e92]
Determining Effective Filing Date for U.S. Patent Reference
Note:
This rule explains how to determine if the filing date of a foreign priority application can be used as the effective filing date under 35 U.S.C. 102(a)(2) when a U.S. patent or published application is being considered as a reference in an application subject to pre-AIA 35 U.S.C. 102.

If a U.S. patent or U.S. published application being considered as a reference in an application subject to pre-AIA 35 U.S.C. 102 claims the priority of a previously filed foreign application, it may be desirable to determine if the foreign application has issued or has been published, to see if there is an earlier date. For example, it has occurred that an examiner rejected claims on the basis of a U.S. patent and the applicant filed affidavits to overcome the filing date of the reference; the affidavits were controversial and the case went to appeal, with an extensive brief and an examiner’s answer having been filed. After all this work, somebody noticed that the U.S. patent reference claimed the priority of a foreign application filed in a country in which patents were issued fairly soon, checked the foreign application, and discovered that the foreign patent had not only been issued, but also published in printed form, more than 1 year prior to the filing date of the application on appeal. If a U.S. patent or U.S. published application is being considered as a reference in an application subject to 35 U.S.C. 102, whether the filing date of the foreign priority application claimed in the reference can be used as the “effectively filed date” under 35 U.S.C. 102(a)(2) is determined by 35 U.S.C. 102(d). See MPEP § 2154.01(b).

Jump to MPEP SourceAIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)Pre-AIA 102(e) – Earlier US Applications (MPEP 2136)Effectively Filed Date for 102(a)(2)
Topic

Certified Copies of Documents

3 rules
StatutoryRequiredAlways
[mpep-901-05-1ccd761600557ecf1ae9c6e4]
Examiner Requires No Proof of Foreign Patent Dates
Note:
The examiner does not need to prove the date or occurrence of events specified in foreign patent documents held by the Office.

The examiner is not required to prove either the date or the occurrence of events specified on specifications of patents or applications, or in official journals, of foreign patent offices which the Office has in its possession. In a court action, certified copies of the Office copies of these documents constitute prima facie evidence in view of 28 U.S.C. 1745. An applicant is entitled to show the contrary by competent evidence, but this question seldom arises.

Jump to MPEP SourceCertified Copies of Documents
StatutoryInformativeAlways
[mpep-901-05-11ef7ce4d0a37f2cf6f5f7e6]
Certified Copies of Office Documents Are Prima Facie Evidence in Court Actions
Note:
In court actions, certified copies of documents from the Office constitute prima facie evidence according to 28 U.S.C. 1745.

The examiner is not required to prove either the date or the occurrence of events specified on specifications of patents or applications, or in official journals, of foreign patent offices which the Office has in its possession. In a court action, certified copies of the Office copies of these documents constitute prima facie evidence in view of 28 U.S.C. 1745. An applicant is entitled to show the contrary by competent evidence, but this question seldom arises.

Jump to MPEP SourceCertified Copies of Documents
StatutoryInformativeAlways
[mpep-901-05-f614c8507cb2ddb5cc9e300b]
Applicant Can Show Contrary by Competent Evidence
Note:
An applicant may present evidence to contradict official documents used as prima facie evidence in court, though this rarely occurs.

The examiner is not required to prove either the date or the occurrence of events specified on specifications of patents or applications, or in official journals, of foreign patent offices which the Office has in its possession. In a court action, certified copies of the Office copies of these documents constitute prima facie evidence in view of 28 U.S.C. 1745. An applicant is entitled to show the contrary by competent evidence, but this question seldom arises.

Jump to MPEP SourceCertified Copies of Documents
Topic

Patent Term Basics

2 rules
StatutoryInformativeAlways
[mpep-901-05-6c9a417a07156a2b6d6cdd99]
Patent Term Varies by Country
Note:
The enforceable length of a patent differs across countries, starting from either the grant date or filing date.

The length of time for which the patent is enforceable (the patent term) varies from country to country. The term of the patent may start as of the grant of the patent, or as of the filing date of the application.

Jump to MPEP SourcePatent Term BasicsPatent Term
StatutoryPermittedAlways
[mpep-901-05-24e9a95b82739c1538927f7d]
Patent Term Starts at Grant or Filing
Note:
The patent term can begin either from the grant of the patent or from the filing date of the application.

The length of time for which the patent is enforceable (the patent term) varies from country to country. The term of the patent may start as of the grant of the patent, or as of the filing date of the application.

Jump to MPEP SourcePatent Term BasicsPatent Term
Topic

Publication Timing (18 Months)

2 rules
StatutoryPermittedAlways
[mpep-901-05-85f7807372fa9bfcbfa3f6bc]
Foreign Documents Can Provide Earlier Publication Dates Even If US Case Is Patented
Note:
Even if a U.S. case becomes patented, foreign documents may still be useful for providing an earlier printed publication date.

If a foreign patent or specification claims the priority of a U.S. application, it can be determined whether the latter is abandoned, still pending, or patented. Even if the U.S. case is or becomes patented, however, the foreign documents may still be useful as supplying an earlier printed publication date.

Jump to MPEP SourcePublication Timing (18 Months)Application PublicationPatent Application Content
StatutoryInformativeAlways
[mpep-901-05-236173a18b52f00722999c2a]
Subject Matter Available as Printed Publication After 18 Months
Note:
If an application filed in a country that publishes applications 18 months after filing, the subject matter will be available as a printed publication on the 18-month date.

If a foreign patent or specification claims the priority of an application in another foreign country, it may sometimes be desirable to check the latter to determine if the subject matter was patented or published at an earlier date. As an example, if a British specification being considered as a reference claims the priority of an application filed in Belgium, it is known at once that a considerably earlier effective date can be established, if needed, because Belgian patents issue soon after filing. In addition, if the application referred to was filed in one of the countries which publish applications in printed form 18 months after filing, the subject matter of the application will be available as a printed publication as of the 18 month publishing date.

Jump to MPEP SourcePublication Timing (18 Months)Application PublicationPatent Application Content
Topic

Access to Patent Application Files (MPEP 101-106)

2 rules
StatutoryRecommendedAlways
[mpep-901-05-bc1de83d5cda09cef8429c3d]
Examiners Must Contact SPE for Online Access to Chemical Abstracts
Note:
Examiners need approval from their SPE and must email the STIC-ERC mailbox to access Chemical Abstracts online.

The determination of whether a foreign patent has been issued or the application published is a comparatively simple matter for some countries, but for some it is quite laborious and time-consuming. Sources for this data which are not maintained by the Office do exist and can be utilized for locating corresponding patents. Two possible sources are the Derwent World Patents Index (DWPI) produced by Thomson Reuters, and the International Patent Documentation Center (INPADOC), which is produced by the European Patent Office. Additionally, Chemical Abstracts Service (CAS) publishes abstracts of patents in the chemical arts from a large number of countries. Only one patent or published specification from a family is abstracted in full and any related family members issued or published are cross-referenced. Chemical Abstracts are available online via commercial databases or via Microfilm/CD-ROM in the Main Scientific and Technical Information Center (STIC). To get access to Chemical Abstracts online, examiners should contact their SPE for approval and email the STIC-ERC mailbox. The microfilm collection is available from 1907-1987; and the CD-ROM collection is available from 1987-2011. The coverage is for approximately 83 journals, with the oldest content dating from 1859. Examiners may also utilize the Global Dossier Public Access which provides online access to the file histories of related applications from participating IP Offices. This includes all international applications filed under the Patent Cooperation Treaty (PCT) as well as patent applications from World Intellectual Property Organization-Centralized Access to Search and Examination (WIPO-CASE) participating offices. See MPEP § 901.08 for additional information. See also www.wipo.int/case/en/ for additional information regarding WIPO-CASE.

Jump to MPEP SourceAccess to Patent Application Files (MPEP 101-106)Global Dossier AccessSearch in National Stage
StatutoryInformativeAlways
[mpep-901-05-c4ffe10221d6b30087dee824]
First Published Document Is Top Listed
Note:
The top document in each related group within the second column of a row is the first published application or patent.

Each horizontal row of boxes contains information on one or more distinct patent documents from a specified country available as a reference under pre-AIA 35 U.S.C. 102(a) and 102(b) or 35 U.S.C. 102(a)(1). If several distinct patent documents are included within a common box of a row, these documents are related to each other and are merely separate documents published at different stages of the same invention’s patenting process. Usually, this related group of documents includes a published application which ripens into an issued patent. Within each box of the second column of each row, the top listed document of a related group is the one that is “published” first (e.g., made available for public inspection by laying open application, or application printed and disseminated to the public). Once an examiner determines the country or organization publishing the documents, the name of the document can be located in the second column of the table and the examiner can determine if a document from the related group containing the same or similar disclosure having an earlier date is available as a reference. Usually, the documents within a related group have identical disclosures; sometimes, however, there are differences in the claims or minor differences in the specification. Therefore, examiners should always verify that the earlier related document also includes the subject matter necessary for the rejection. Some countries issue more than one type of patent and for clarity, in these situations, separate rows are provided for each type.

Jump to MPEP SourceAccess to Patent Application Files (MPEP 101-106)Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Topic

AIA 102(a)(1) – Prior Art Categories (MPEP 2152.02)

1 rules
StatutoryPermittedAlways
[mpep-901-05-8c09bc5217a7678b051898a4]
Abstract May Be Published But Not Specification
Note:
The specification cannot be printed, but an abstract may be published in printed form. This allows the application to serve as prior art.

This publication may take either of two forms. In the first form, some countries publish a notice giving certain particulars in their official journal, and thereafter, any one may see the papers at the patent office or order copies. This procedure is referred to as “laying open for public inspection.” There is no printed publication of the specification, although an abstract may be published in printed form. If anyone can inspect or obtain copies of the laid open application, then it is sufficiently accessible to the public to constitute a “publication” within the meaning of pre-AIA 35 U.S.C. 102(a) and 102(b) and 35 U.S.C. 102(a)(1). The full application is thus available as prior art as of either the date of publication of its notice or its laying open to public inspection if this is a later date. See In re Wyer, 655 F.2d 221, 210 USPQ 790 (CCPA 1981). See MPEP § 2127, paragraph III.

Jump to MPEP SourceAIA 102(a)(1) – Prior Art Categories (MPEP 2152.02)Printed Publication as Prior Art (MPEP 2128)Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Topic

Public Use Under AIA (MPEP 2152.02(c))

1 rules
StatutoryPermittedAlways
[mpep-901-05-20b4ec7091f9ef48183cdea6]
Laid Open Application Is Publicly Accessible
Note:
If anyone can inspect or obtain copies of a laid open application, it is considered publicly accessible and constitutes prior art.

This publication may take either of two forms. In the first form, some countries publish a notice giving certain particulars in their official journal, and thereafter, any one may see the papers at the patent office or order copies. This procedure is referred to as “laying open for public inspection.” There is no printed publication of the specification, although an abstract may be published in printed form. If anyone can inspect or obtain copies of the laid open application, then it is sufficiently accessible to the public to constitute a “publication” within the meaning of pre-AIA 35 U.S.C. 102(a) and 102(b) and 35 U.S.C. 102(a)(1). The full application is thus available as prior art as of either the date of publication of its notice or its laying open to public inspection if this is a later date. See In re Wyer, 655 F.2d 221, 210 USPQ 790 (CCPA 1981). See MPEP § 2127, paragraph III.

Jump to MPEP SourcePublic Use Under AIA (MPEP 2152.02(c))Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
Topic

Publication Date Determination

1 rules
StatutoryInformativeAlways
[mpep-901-05-c501796ab4579b507b0750fd]
Publication Date Determined by Notice or Laying Open
Note:
The full application is available as prior art on the date of publication notice or laying open to public inspection, whichever is later.

This publication may take either of two forms. In the first form, some countries publish a notice giving certain particulars in their official journal, and thereafter, any one may see the papers at the patent office or order copies. This procedure is referred to as “laying open for public inspection.” There is no printed publication of the specification, although an abstract may be published in printed form. If anyone can inspect or obtain copies of the laid open application, then it is sufficiently accessible to the public to constitute a “publication” within the meaning of pre-AIA 35 U.S.C. 102(a) and 102(b) and 35 U.S.C. 102(a)(1). The full application is thus available as prior art as of either the date of publication of its notice or its laying open to public inspection if this is a later date. See In re Wyer, 655 F.2d 221, 210 USPQ 790 (CCPA 1981). See MPEP § 2127, paragraph III.

Jump to MPEP SourcePublication Date DeterminationPre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Topic

Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)

1 rules
StatutoryInformativeAlways
[mpep-901-05-6a6f7b274ef52d9c2ec4a9fb]
Published Documents Are References Under Pre-AIA 35 U.S.C. 102
Note:
These documents, published through official channels, serve as references for prior art under pre-AIA 35 U.S.C. 102.

The publication for opposition may take the form of a laying open of the application by the publication of a notice in the official journal with the application being then open to public inspection and the obtaining of copies. Otherwise, publication occurs by the issue of the applications in printed form. Either way, these published documents constitute printed publications which are available as references under pre-AIA 35 U.S.C. 102(a) and 102(b) and 35 U.S.C. 102(a)(1).

Jump to MPEP SourcePrior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)AIA vs Pre-AIA 102 (MPEP 2151)AIA vs Pre-AIA Practice
Topic

Signature Requirements

1 rules
StatutoryRequiredAlways
[mpep-901-05-321dfddb21471c44fcf1fff9]
Examiner Must Sign Patent Grant
Note:
In some countries, the examiner grants a patent by signing the required document after certain events have occurred.

Practices and terminology vary worldwide regarding patents. In some countries, there is no “letters patent” document which creates and grants the rights. In other countries, the examiner grants the patent by signing the required paper. In a few countries, the patent is granted by operation of law after certain events have occurred. The term “granting the patent” is used here for convenience, but it should be noted that 35 U.S.C. 102(a) and 102(b) or 35 U.S.C. 102(a)(1) do not use this terminology.

Jump to MPEP SourceSignature RequirementsNovelty / Prior Art
Topic

Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)

1 rules
StatutoryInformativeAlways
[mpep-901-05-e9309631e1e373fd3c284ca5]
Prior Art Documents for Pre-AIA Rejections
Note:
Documents from a specified country must be listed if they contain earlier disclosures than the claimed invention.

Each horizontal row of boxes contains information on one or more distinct patent documents from a specified country available as a reference under pre-AIA 35 U.S.C. 102(a) and 102(b) or 35 U.S.C. 102(a)(1). If several distinct patent documents are included within a common box of a row, these documents are related to each other and are merely separate documents published at different stages of the same invention’s patenting process. Usually, this related group of documents includes a published application which ripens into an issued patent. Within each box of the second column of each row, the top listed document of a related group is the one that is “published” first (e.g., made available for public inspection by laying open application, or application printed and disseminated to the public). Once an examiner determines the country or organization publishing the documents, the name of the document can be located in the second column of the table and the examiner can determine if a document from the related group containing the same or similar disclosure having an earlier date is available as a reference. Usually, the documents within a related group have identical disclosures; sometimes, however, there are differences in the claims or minor differences in the specification. Therefore, examiners should always verify that the earlier related document also includes the subject matter necessary for the rejection. Some countries issue more than one type of patent and for clarity, in these situations, separate rows are provided for each type.

Jump to MPEP SourcePrior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)AIA vs Pre-AIA 102 (MPEP 2151)
Topic

Identity of Invention

1 rules
StatutoryInformativeAlways
[mpep-901-05-4e8137b6e3503a41b560bb4d]
Documents in Same Box Are Related Stages of Invention
Note:
If several distinct patent documents are included within a common box, they represent different stages of the same invention’s patenting process.

Each horizontal row of boxes contains information on one or more distinct patent documents from a specified country available as a reference under pre-AIA 35 U.S.C. 102(a) and 102(b) or 35 U.S.C. 102(a)(1). If several distinct patent documents are included within a common box of a row, these documents are related to each other and are merely separate documents published at different stages of the same invention’s patenting process. Usually, this related group of documents includes a published application which ripens into an issued patent. Within each box of the second column of each row, the top listed document of a related group is the one that is “published” first (e.g., made available for public inspection by laying open application, or application printed and disseminated to the public). Once an examiner determines the country or organization publishing the documents, the name of the document can be located in the second column of the table and the examiner can determine if a document from the related group containing the same or similar disclosure having an earlier date is available as a reference. Usually, the documents within a related group have identical disclosures; sometimes, however, there are differences in the claims or minor differences in the specification. Therefore, examiners should always verify that the earlier related document also includes the subject matter necessary for the rejection. Some countries issue more than one type of patent and for clarity, in these situations, separate rows are provided for each type.

Jump to MPEP SourceIdentity of InventionPre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Topic

Access to Patent File Wrapper

1 rules
StatutoryInformativeAlways
[mpep-901-05-43a08308c9017d5ba01d0bf4]
Published Application Ripens into Issued Patent
Note:
This rule states that a published application, which is part of a related group of documents, eventually becomes an issued patent.

Each horizontal row of boxes contains information on one or more distinct patent documents from a specified country available as a reference under pre-AIA 35 U.S.C. 102(a) and 102(b) or 35 U.S.C. 102(a)(1). If several distinct patent documents are included within a common box of a row, these documents are related to each other and are merely separate documents published at different stages of the same invention’s patenting process. Usually, this related group of documents includes a published application which ripens into an issued patent. Within each box of the second column of each row, the top listed document of a related group is the one that is “published” first (e.g., made available for public inspection by laying open application, or application printed and disseminated to the public). Once an examiner determines the country or organization publishing the documents, the name of the document can be located in the second column of the table and the examiner can determine if a document from the related group containing the same or similar disclosure having an earlier date is available as a reference. Usually, the documents within a related group have identical disclosures; sometimes, however, there are differences in the claims or minor differences in the specification. Therefore, examiners should always verify that the earlier related document also includes the subject matter necessary for the rejection. Some countries issue more than one type of patent and for clarity, in these situations, separate rows are provided for each type.

Jump to MPEP SourceAccess to Patent File WrapperAccess to Published Application FileAIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Topic

Elements of Anticipation (MPEP 2131)

1 rules
StatutoryRecommendedAlways
[mpep-901-05-525f52d03be1ecef93fb13f5]
Examiners Must Verify Earlier Document Includes Subject Matter For Rejection
Note:
Examiners should ensure the earlier document in a related group contains all necessary subject matter for rejection, even if claims or specifications differ.

Each horizontal row of boxes contains information on one or more distinct patent documents from a specified country available as a reference under pre-AIA 35 U.S.C. 102(a) and 102(b) or 35 U.S.C. 102(a)(1). If several distinct patent documents are included within a common box of a row, these documents are related to each other and are merely separate documents published at different stages of the same invention’s patenting process. Usually, this related group of documents includes a published application which ripens into an issued patent. Within each box of the second column of each row, the top listed document of a related group is the one that is “published” first (e.g., made available for public inspection by laying open application, or application printed and disseminated to the public). Once an examiner determines the country or organization publishing the documents, the name of the document can be located in the second column of the table and the examiner can determine if a document from the related group containing the same or similar disclosure having an earlier date is available as a reference. Usually, the documents within a related group have identical disclosures; sometimes, however, there are differences in the claims or minor differences in the specification. Therefore, examiners should always verify that the earlier related document also includes the subject matter necessary for the rejection. Some countries issue more than one type of patent and for clarity, in these situations, separate rows are provided for each type.

Jump to MPEP SourceElements of Anticipation (MPEP 2131)Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Topic

Claims

1 rules
MPEP GuidanceRecommendedAlways
[mpep-901-05-85258189f905b833ba5273dd]
Events Occurring on U.S. Patent Issue Date
Note:
Describes the multiple events that occur when a U.S. patent is issued, including document execution, rights creation, and public availability of specifications.
This section includes some general information on foreign patent laws and summarizes particular features and their terminology. Some additional details on the most commonly cited foreign patent publications may be found under the individual country in paragraph V., below. Examiners should recall that, in contrast to the practice in many other countries, under U.S. patent law a number of different events all occur on the issue date of a U.S. patent. These events include the following:
  • (A) a patent document, the “letters patent'' which grants and thereby creates the legal rights conferred by a patent, is executed and sent to the applicant;
  • (B) the patent rights come into existence;
  • (C) the patent rights can be exercised;
  • (D) the specification of the patent becomes available to the public;
  • (E) the patented file becomes available to the public;
  • (F) the specification is published in printed form; and
  • (G) an issue of an official journal, the Official Gazette, containing an announcement of the patent and a claim, is published.
Jump to MPEP SourceOfficial Gazette – Patents (MPEP 1730)Patent Application Content
Topic

Official Gazette – Patents (MPEP 1730)

1 rules
MPEP GuidanceInformativeAlways
[mpep-901-05-298fd96c2130f392ed6fdf39]
Publication of Official Gazette Containing Patent Announcement and Claim Required
Note:
Examiners must ensure an official journal, the Official Gazette, publishes an announcement of the patent and a claim on the issue date.

This section includes some general information on foreign patent laws and summarizes particular features and their terminology. Some additional details on the most commonly cited foreign patent publications may be found under the individual country in paragraph V., below. Examiners should recall that, in contrast to the practice in many other countries, under U.S. patent law a number of different events all occur on the issue date of a U.S. patent. These events include the following:

(G) an issue of an official journal, the Official Gazette, containing an announcement of the patent and a claim, is published.

Jump to MPEP SourceOfficial Gazette – Patents (MPEP 1730)

Citations

Primary topicCitation
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)35 U.S.C. § 102
35 U.S.C. 102 – Novelty / Prior Art
AIA 102(a)(1) – Prior Art Categories (MPEP 2152.02)
Access to Patent Application Files (MPEP 101-106)
Access to Patent File Wrapper
Elements of Anticipation (MPEP 2131)
Identity of Invention
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)
Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
Public Use Under AIA (MPEP 2152.02(c))
Publication Date Determination
Signature Requirements
35 U.S.C. § 102(a)
35 U.S.C. 102 – Novelty / Prior Art
AIA 102(a)(1) – Prior Art Categories (MPEP 2152.02)
Access to Patent Application Files (MPEP 101-106)
Access to Patent File Wrapper
Elements of Anticipation (MPEP 2131)
Identity of Invention
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)
Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
Public Use Under AIA (MPEP 2152.02(c))
Publication Date Determination
Signature Requirements
35 U.S.C. § 102(a)(1)
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)35 U.S.C. § 102(a)(2)
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)35 U.S.C. § 102(d)
AIA 102(a)(1) – Prior Art Categories (MPEP 2152.02)
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Public Use Under AIA (MPEP 2152.02(c))
Publication Date Determination
MPEP § 2127
MPEP § 213
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)MPEP § 2154.01(b)
MPEP § 707.05(e)
MPEP § 901.05(a)
Patent Grant and Document FormatMPEP § 901.06(a)
Access to Patent Application Files (MPEP 101-106)
Global Dossier Access
MPEP § 901.08
AIA 102(a)(1) – Prior Art Categories (MPEP 2152.02)
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Public Use Under AIA (MPEP 2152.02(c))
Publication Date Determination
In re Wyer, 655 F.2d 221, 210 USPQ 790 (CCPA 1981)

Source Text from USPTO’s MPEP

This is an exact copy of the MPEP from the USPTO. It is here for your reference to see the section in context.

BlueIron Last Updated: 2026-01-17