MPEP § 2127 — Domestic and Foreign Patent Applications as Prior Art (Annotated Rules)

§2127 Domestic and Foreign Patent Applications as Prior Art

USPTO MPEP version: BlueIron's Update: 2026-01-10

This page consolidates and annotates all enforceable requirements under MPEP § 2127, 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.

Domestic and Foreign Patent Applications as Prior Art

This section addresses Domestic and Foreign Patent Applications as Prior Art. Primary authority: 35 U.S.C. 102(a)(2), 35 U.S.C. 102(e), and 35 U.S.C. 119. Contains: 1 prohibition, 1 guidance statement, 1 permission, and 8 other statements.

Key Rules

Topic

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

4 rules
StatutoryPermittedAlways
[mpep-2127-cbb265369cf9e5a601819025]
Abandoned Application Must Be Appropriately Disclosed to Become Prior Art
Note:
An abandoned patent application can serve as prior art only if it has been properly disclosed, such as being referenced in another publication or through voluntary disclosure.

“An abandoned patent application may become evidence of prior art only when it has been appropriately disclosed, as, for example, when the abandoned patent [application] is reference[d] in the disclosure of another patent, in a publication, or by voluntary disclosure under [former Defensive Publication rule] 37 CFR 1.139 [Reserved].” Lee Pharmaceutical v. Kreps, 577 F.2d 610, 613, 198 USPQ 601, 605 (9th Cir. 1978). An abandoned patent application becomes available as prior art only as of the date the public gains access to it. See 37 CFR 1.14(a)(1)(ii) and (iv). However, the subject matter of an abandoned application, including both provisional and nonprovisional applications, referred to in a prior art U.S. patent or U.S. patent application publication may be relied on in a 35 U.S.C. 102(a)(2) or pre-AIA 35 U.S.C. 102(e) rejection based on that patent or patent application publication if the disclosure of the abandoned application is actually included or incorporated by reference in the patent or patent application publication. Compare In re Lund, 376 F.2d 982, 991, 153 USPQ 625, 633 (CCPA 1967) (The court reversed a rejection over a patent which was a continuation-in-part of an abandoned application. Applicant’s filing date preceded the issue date of the patent reference. The abandoned application contained subject matter which was essential to the rejection but which was not carried over into the continuation-in-part. The court held that the subject matter embodied in the canceled example 2 could not be relied on as of either parent or child filing date. Thus, the use of example 2 subject matter to reject the claims under pre-AIA 35 U.S.C. 102(e) was improper.). See also MPEP § 901.02. See MPEP § 2136.02 and MPEP § 2136.03 for the 35 U.S.C. 102(e) date of a U.S. patent claiming priority under 35 U.S.C. 119 or 35 U.S.C. 120. See MPEP § 2154 for prior art under 35 U.S.C. 102(a)(2).

Jump to MPEP Source · 37 CFR 1.139Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)Access to Abandoned Applications
StatutoryInformativeAlways
[mpep-2127-08bd1ce372aaa543b0283148]
Abandoned Patent Application Becomes Prior Art Only When Disclosed
Note:
An abandoned patent application can be used as prior art only if it has been appropriately disclosed, such as in another patent or publication.

“An abandoned patent application may become evidence of prior art only when it has been appropriately disclosed, as, for example, when the abandoned patent [application] is reference[d] in the disclosure of another patent, in a publication, or by voluntary disclosure under [former Defensive Publication rule] 37 CFR 1.139 [Reserved].” Lee Pharmaceutical v. Kreps, 577 F.2d 610, 613, 198 USPQ 601, 605 (9th Cir. 1978). An abandoned patent application becomes available as prior art only as of the date the public gains access to it. See 37 CFR 1.14(a)(1)(ii) and (iv). However, the subject matter of an abandoned application, including both provisional and nonprovisional applications, referred to in a prior art U.S. patent or U.S. patent application publication may be relied on in a 35 U.S.C. 102(a)(2) or pre-AIA 35 U.S.C. 102(e) rejection based on that patent or patent application publication if the disclosure of the abandoned application is actually included or incorporated by reference in the patent or patent application publication. Compare In re Lund, 376 F.2d 982, 991, 153 USPQ 625, 633 (CCPA 1967) (The court reversed a rejection over a patent which was a continuation-in-part of an abandoned application. Applicant’s filing date preceded the issue date of the patent reference. The abandoned application contained subject matter which was essential to the rejection but which was not carried over into the continuation-in-part. The court held that the subject matter embodied in the canceled example 2 could not be relied on as of either parent or child filing date. Thus, the use of example 2 subject matter to reject the claims under pre-AIA 35 U.S.C. 102(e) was improper.). See also MPEP § 901.02. See MPEP § 2136.02 and MPEP § 2136.03 for the 35 U.S.C. 102(e) date of a U.S. patent claiming priority under 35 U.S.C. 119 or 35 U.S.C. 120. See MPEP § 2154 for prior art under 35 U.S.C. 102(a)(2).

Jump to MPEP Source · 37 CFR 1.139Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)Access to Abandoned Applications
StatutoryInformativeAlways
[mpep-2127-1cfd0630ba1daa75a6a410e7]
Canceled Figures as Prior Art Under Pre-AIA 102(b)
Note:
Figures canceled from a Canadian patent application before issuance were available as prior art one year before the effective filing date of the claimed inventions.

Figures that had been canceled from a Canadian patent application before issuance of the patent were available as prior art under pre-AIA 35 U.S.C. 102(b) as of the date the application became publicly accessible. The patent at issue and its underlying application were available for public inspection at the Canadian Patent Office more than one year before the effective filing date of the claimed inventions in the patents in suit. Bruckelmyer v. Ground Heaters, Inc., 445 F.3d 1374, 78 USPQ2d 1684 (Fed. Cir. 2006).

Jump to MPEP SourcePre-AIA 102(d) – Foreign Patenting (MPEP 2135)Patented Prior Art (MPEP 2152.02(a))
StatutoryInformativeAlways
[mpep-2127-f3895fc44efbde8a162d288f]
Publication of Specification Required for Pre-AIA 102(a)
Note:
The specification must be published in an official journal and accessible to the public to satisfy pre-AIA 102(a) requirements.

When the specification is not issued in printed form but is announced in an official journal and anyone can inspect or obtain copies, it is sufficiently accessible to the public to constitute a “publication” within the meaning of 35 U.S.C. 102(a)(1) or pre-AIA 35 U.S.C. 102(a) and (b). See In re Wyer, 655 F.2d 221, 210 USPQ 790 (CCPA 1981).

Jump to MPEP SourcePre-AIA 102(d) – Foreign Patenting (MPEP 2135)Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
Topic

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

3 rules
StatutoryInformativeAlways
[mpep-2127-13566f5323d1b756c4c2ed37]
Subject Matter of Abandoned Applications Cannot Be Relied Upon for Pre-AIA 102(e) Rejection
Note:
The subject matter from an abandoned application cannot be used to reject claims under pre-AIA 35 U.S.C. 102(e) unless it is actually included or incorporated by reference in a patent or patent application publication.

“An abandoned patent application may become evidence of prior art only when it has been appropriately disclosed, as, for example, when the abandoned patent [application] is reference[d] in the disclosure of another patent, in a publication, or by voluntary disclosure under [former Defensive Publication rule] 37 CFR 1.139 [Reserved].” Lee Pharmaceutical v. Kreps, 577 F.2d 610, 613, 198 USPQ 601, 605 (9th Cir. 1978). An abandoned patent application becomes available as prior art only as of the date the public gains access to it. See 37 CFR 1.14(a)(1)(ii) and (iv). However, the subject matter of an abandoned application, including both provisional and nonprovisional applications, referred to in a prior art U.S. patent or U.S. patent application publication may be relied on in a 35 U.S.C. 102(a)(2) or pre-AIA 35 U.S.C. 102(e) rejection based on that patent or patent application publication if the disclosure of the abandoned application is actually included or incorporated by reference in the patent or patent application publication. Compare In re Lund, 376 F.2d 982, 991, 153 USPQ 625, 633 (CCPA 1967) (The court reversed a rejection over a patent which was a continuation-in-part of an abandoned application. Applicant’s filing date preceded the issue date of the patent reference. The abandoned application contained subject matter which was essential to the rejection but which was not carried over into the continuation-in-part. The court held that the subject matter embodied in the canceled example 2 could not be relied on as of either parent or child filing date. Thus, the use of example 2 subject matter to reject the claims under pre-AIA 35 U.S.C. 102(e) was improper.). See also MPEP § 901.02. See MPEP § 2136.02 and MPEP § 2136.03 for the 35 U.S.C. 102(e) date of a U.S. patent claiming priority under 35 U.S.C. 119 or 35 U.S.C. 120. See MPEP § 2154 for prior art under 35 U.S.C. 102(a)(2).

Jump to MPEP Source · 37 CFR 1.139AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)Pre-AIA 102(e) – Earlier US Applications (MPEP 2136)
StatutoryProhibitedAlways
[mpep-2127-b1e0464bc9ccf862c69e6684]
Canceled Matter Cannot Be Used as Prior Art Under AIA 102(a)(2)
Note:
The rule states that canceled matter in a U.S. patent application cannot be relied upon for rejection under 35 U.S.C. 102(a)(2) or pre-AIA 35 U.S.C. 102(e).

Canceled matter in the application file of a U.S. patent or application publication cannot be relied upon in a rejection under 35 U.S.C. 102(a)(2) or pre-AIA 35 U.S.C. 102(e). Ex Parte Stalego, 154 USPQ 52, 53 (Bd. App. 1966). The canceled matter only becomes available as prior art as of the date the application file history becomes available to the public. In re Lund, 376 F.2d 982, 153 USPQ 625 (CCPA 1967). However, as discussed below, such matter may be available as prior art under 35 U.S.C. 102(a)(1) or pre-AIA 35 U.S.C. 102(b). For more information on available prior art for use in pre-AIA 35 U.S.C. 102(e) rejections, see MPEP § 2136.02. For more information on available prior art for use in 35 U.S.C. 102(a)(2) rejections, see MPEP § 2154 et seq.

Jump to MPEP SourceAIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)Pre-AIA 102(e) – Earlier US Applications (MPEP 2136)Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)
StatutoryInformativeAlways
[mpep-2127-a258663bc677160a4f775d38]
Requirement for Common Inventor Between Unpublished and Examined Applications
Note:
If an unpublished application shares at least one inventor with the examined application, a rejection may be proper under certain circumstances.

As specified in 37 CFR 1.14(a), all pending U.S. patent applications are preserved in confidence except for published applications (see also 35 U.S.C. 122(b)), reissue applications, and applications in which a request to open the complete application to inspection by the public has been granted by the Office (37 CFR 1.11(b)). However, if an application that has not been published has an assignee or at least one inventor in common with the application being examined, a rejection will be proper in some circumstances. For instance, when the claims between the two applications are not independent or distinct, a provisional double patenting rejection is made. See MPEP § 804. If the copending applications differ by at least one joint inventor and at least one of the applications would have been obvious in view of the other, a provisional rejection over 35 U.S.C. 102(a)(2) or pre-AIA 35 U.S.C. 102(e) or 35 U.S.C. 103 is made when appropriate. See MPEP §§ 2136.01, 2146.03(a) and 2154.01(d).

Jump to MPEP Source · 37 CFR 1.14(a)AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)Pre-AIA 102(e) – Earlier US Applications (MPEP 2136)Who May File Reissue
Topic

Publication of Board Decision

3 rules
StatutoryInformativeAlways
[mpep-2127-0be3d89d92f892065c0ea439]
Laid Open Applications Are Published Prior Art
Note:
Patent applications made accessible through reproduction technology are considered published prior art for determining patent validity.

One board decision, however, has held that laid open patent applications are not “published” and cannot constitute prior art. Ex parte Haller, 103 USPQ 332 (Bd. App. 1953). Whether or not a document is “published” for the purposes of 35 U.S.C. 102 and 35 U.S.C. 103 depends on how accessible the document is to the public. As technology has made reproduction of documents easier, the accessibility of the laid open applications has increased. Items provided in easily reproducible form have thus become “printed publications” as the phrase is used in 35 U.S.C. 102. In re Wyer, 655 F.2d 221, 226, 210 USPQ 790, 794 (CCPA 1981) (Laid open Australian patent application held to be a “printed publication” even though only the abstract was published because it was laid open for public inspection, microfilmed, “diazo copies” were distributed to five suboffices having suitable reproduction equipment and the diazo copies were available for sale.). The contents of a foreign patent application should not be relied upon as prior art until the date of publication (i.e., the insertion into the laid open application) can be confirmed by an examiner’s review of a copy of the document. See MPEP § 901.05.

Jump to MPEP SourcePublication of Board DecisionBoard Decision TypesPublication Date Determination
StatutoryInformativeAlways
[mpep-2127-6866b31cba01196588090803]
Laid Open Patent Application as Printed Publication
Note:
A laid open patent application, even if only the abstract is published and available in easily reproducible form, can be considered a printed publication for prior art purposes.

One board decision, however, has held that laid open patent applications are not “published” and cannot constitute prior art. Ex parte Haller, 103 USPQ 332 (Bd. App. 1953). Whether or not a document is “published” for the purposes of 35 U.S.C. 102 and 35 U.S.C. 103 depends on how accessible the document is to the public. As technology has made reproduction of documents easier, the accessibility of the laid open applications has increased. Items provided in easily reproducible form have thus become “printed publications” as the phrase is used in 35 U.S.C. 102. In re Wyer, 655 F.2d 221, 226, 210 USPQ 790, 794 (CCPA 1981) (Laid open Australian patent application held to be a “printed publication” even though only the abstract was published because it was laid open for public inspection, microfilmed, “diazo copies” were distributed to five suboffices having suitable reproduction equipment and the diazo copies were available for sale.). The contents of a foreign patent application should not be relied upon as prior art until the date of publication (i.e., the insertion into the laid open application) can be confirmed by an examiner’s review of a copy of the document. See MPEP § 901.05.

Jump to MPEP SourcePublication of Board DecisionPrinted Publication as Prior Art (MPEP 2128)Novelty / Prior Art
StatutoryRecommendedAlways
[mpep-2127-7cf385f9ab065cb58f0603e6]
Confirmation of Publication Date Needed for Foreign Patent Applications as Prior Art
Note:
Examiners must confirm the publication date by reviewing a copy of the document before relying on foreign patent applications as prior art.

One board decision, however, has held that laid open patent applications are not “published” and cannot constitute prior art. Ex parte Haller, 103 USPQ 332 (Bd. App. 1953). Whether or not a document is “published” for the purposes of 35 U.S.C. 102 and 35 U.S.C. 103 depends on how accessible the document is to the public. As technology has made reproduction of documents easier, the accessibility of the laid open applications has increased. Items provided in easily reproducible form have thus become “printed publications” as the phrase is used in 35 U.S.C. 102. In re Wyer, 655 F.2d 221, 226, 210 USPQ 790, 794 (CCPA 1981) (Laid open Australian patent application held to be a “printed publication” even though only the abstract was published because it was laid open for public inspection, microfilmed, “diazo copies” were distributed to five suboffices having suitable reproduction equipment and the diazo copies were available for sale.). The contents of a foreign patent application should not be relied upon as prior art until the date of publication (i.e., the insertion into the laid open application) can be confirmed by an examiner’s review of a copy of the document. See MPEP § 901.05.

Jump to MPEP SourcePublication of Board DecisionPublication Date DeterminationBoard Decision Types
Topic

Access to Abandoned Applications

2 rules
StatutoryPermittedAlways
[mpep-2127-2cf7543ae4e0e07f610c2f49]
Access to Abandoned Patent Applications as Prior Art
Note:
An abandoned patent application can serve as prior art only if publicly accessible and referenced in another publication.

“An abandoned patent application may become evidence of prior art only when it has been appropriately disclosed, as, for example, when the abandoned patent [application] is reference[d] in the disclosure of another patent, in a publication, or by voluntary disclosure under [former Defensive Publication rule] 37 CFR 1.139 [Reserved].” Lee Pharmaceutical v. Kreps, 577 F.2d 610, 613, 198 USPQ 601, 605 (9th Cir. 1978). An abandoned patent application becomes available as prior art only as of the date the public gains access to it. See 37 CFR 1.14(a)(1)(ii) and (iv). However, the subject matter of an abandoned application, including both provisional and nonprovisional applications, referred to in a prior art U.S. patent or U.S. patent application publication may be relied on in a 35 U.S.C. 102(a)(2) or pre-AIA 35 U.S.C. 102(e) rejection based on that patent or patent application publication if the disclosure of the abandoned application is actually included or incorporated by reference in the patent or patent application publication. Compare In re Lund, 376 F.2d 982, 991, 153 USPQ 625, 633 (CCPA 1967) (The court reversed a rejection over a patent which was a continuation-in-part of an abandoned application. Applicant’s filing date preceded the issue date of the patent reference. The abandoned application contained subject matter which was essential to the rejection but which was not carried over into the continuation-in-part. The court held that the subject matter embodied in the canceled example 2 could not be relied on as of either parent or child filing date. Thus, the use of example 2 subject matter to reject the claims under pre-AIA 35 U.S.C. 102(e) was improper.). See also MPEP § 901.02. See MPEP § 2136.02 and MPEP § 2136.03 for the 35 U.S.C. 102(e) date of a U.S. patent claiming priority under 35 U.S.C. 119 or 35 U.S.C. 120. See MPEP § 2154 for prior art under 35 U.S.C. 102(a)(2).

Jump to MPEP Source · 37 CFR 1.139Access to Abandoned ApplicationsAIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)Pre-AIA 102(e) – Earlier US Applications (MPEP 2136)
StatutoryInformativeAlways
[mpep-2127-2e3d43702ecff0343fdf9ac9]
Subject Matter from Abandoned Applications Can Be Used as Prior Art
Note:
The subject matter of an abandoned application can be used in a rejection if it is included or incorporated by reference in another patent publication.

“An abandoned patent application may become evidence of prior art only when it has been appropriately disclosed, as, for example, when the abandoned patent [application] is reference[d] in the disclosure of another patent, in a publication, or by voluntary disclosure under [former Defensive Publication rule] 37 CFR 1.139 [Reserved].” Lee Pharmaceutical v. Kreps, 577 F.2d 610, 613, 198 USPQ 601, 605 (9th Cir. 1978). An abandoned patent application becomes available as prior art only as of the date the public gains access to it. See 37 CFR 1.14(a)(1)(ii) and (iv). However, the subject matter of an abandoned application, including both provisional and nonprovisional applications, referred to in a prior art U.S. patent or U.S. patent application publication may be relied on in a 35 U.S.C. 102(a)(2) or pre-AIA 35 U.S.C. 102(e) rejection based on that patent or patent application publication if the disclosure of the abandoned application is actually included or incorporated by reference in the patent or patent application publication. Compare In re Lund, 376 F.2d 982, 991, 153 USPQ 625, 633 (CCPA 1967) (The court reversed a rejection over a patent which was a continuation-in-part of an abandoned application. Applicant’s filing date preceded the issue date of the patent reference. The abandoned application contained subject matter which was essential to the rejection but which was not carried over into the continuation-in-part. The court held that the subject matter embodied in the canceled example 2 could not be relied on as of either parent or child filing date. Thus, the use of example 2 subject matter to reject the claims under pre-AIA 35 U.S.C. 102(e) was improper.). See also MPEP § 901.02. See MPEP § 2136.02 and MPEP § 2136.03 for the 35 U.S.C. 102(e) date of a U.S. patent claiming priority under 35 U.S.C. 119 or 35 U.S.C. 120. See MPEP § 2154 for prior art under 35 U.S.C. 102(a)(2).

Jump to MPEP Source · 37 CFR 1.139Access to Abandoned ApplicationsPre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Topic

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

2 rules
StatutoryPermittedAlways
[mpep-2127-527380341305632b2322e7c4]
Canceled Matter as Prior Art Is Restricted to Publicly Available Dates
Note:
The rule states that canceled matter in an application file can only be considered prior art after it becomes publicly available, but may still be used under certain conditions.

Canceled matter in the application file of a U.S. patent or application publication cannot be relied upon in a rejection under 35 U.S.C. 102(a)(2) or pre-AIA 35 U.S.C. 102(e). Ex Parte Stalego, 154 USPQ 52, 53 (Bd. App. 1966). The canceled matter only becomes available as prior art as of the date the application file history becomes available to the public. In re Lund, 376 F.2d 982, 153 USPQ 625 (CCPA 1967). However, as discussed below, such matter may be available as prior art under 35 U.S.C. 102(a)(1) or pre-AIA 35 U.S.C. 102(b). For more information on available prior art for use in pre-AIA 35 U.S.C. 102(e) rejections, see MPEP § 2136.02. For more information on available prior art for use in 35 U.S.C. 102(a)(2) rejections, see MPEP § 2154 et seq.

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)
StatutoryInformativeAlways
[mpep-2127-064650db30200424863065ad]
Available Prior Art for Pre-AIA 102(e) Rejections
Note:
Provides information on using available prior art in pre-AIA 35 U.S.C. 102(e) rejections.

Canceled matter in the application file of a U.S. patent or application publication cannot be relied upon in a rejection under 35 U.S.C. 102(a)(2) or pre-AIA 35 U.S.C. 102(e). Ex Parte Stalego, 154 USPQ 52, 53 (Bd. App. 1966). The canceled matter only becomes available as prior art as of the date the application file history becomes available to the public. In re Lund, 376 F.2d 982, 153 USPQ 625 (CCPA 1967). However, as discussed below, such matter may be available as prior art under 35 U.S.C. 102(a)(1) or pre-AIA 35 U.S.C. 102(b). For more information on available prior art for use in pre-AIA 35 U.S.C. 102(e) rejections, see MPEP § 2136.02. For more information on available prior art for use in 35 U.S.C. 102(a)(2) rejections, see MPEP § 2154 et seq.

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

35 U.S.C. 102 – Novelty / Prior Art

2 rules
StatutoryInformativeAlways
[mpep-2127-46175f96ff466e8ebe13c5e4]
Canceled Matter as Prior Art
Note:
Explains when canceled matter in an application file can be used as prior art for 35 U.S.C. 102(a)(2) rejections.

Canceled matter in the application file of a U.S. patent or application publication cannot be relied upon in a rejection under 35 U.S.C. 102(a)(2) or pre-AIA 35 U.S.C. 102(e). Ex Parte Stalego, 154 USPQ 52, 53 (Bd. App. 1966). The canceled matter only becomes available as prior art as of the date the application file history becomes available to the public. In re Lund, 376 F.2d 982, 153 USPQ 625 (CCPA 1967). However, as discussed below, such matter may be available as prior art under 35 U.S.C. 102(a)(1) or pre-AIA 35 U.S.C. 102(b). For more information on available prior art for use in pre-AIA 35 U.S.C. 102(e) rejections, see MPEP § 2136.02. For more information on available prior art for use in 35 U.S.C. 102(a)(2) rejections, see MPEP § 2154 et seq.

Jump to MPEP SourceNovelty / Prior ArtPre-AIA 102(d) – Foreign Patenting (MPEP 2135)
StatutoryInformativeAlways
[mpep-2127-5c17a2c4466162e0863fdc6f]
Published Document Accessibility Determines Prior Art
Note:
The accessibility of a document to the public determines whether it constitutes prior art under 35 U.S.C. 102 and 35 U.S.C. 103.

One board decision, however, has held that laid open patent applications are not “published” and cannot constitute prior art. Ex parte Haller, 103 USPQ 332 (Bd. App. 1953). Whether or not a document is “published” for the purposes of 35 U.S.C. 102 and 35 U.S.C. 103 depends on how accessible the document is to the public. As technology has made reproduction of documents easier, the accessibility of the laid open applications has increased. Items provided in easily reproducible form have thus become “printed publications” as the phrase is used in 35 U.S.C. 102. In re Wyer, 655 F.2d 221, 226, 210 USPQ 790, 794 (CCPA 1981) (Laid open Australian patent application held to be a “printed publication” even though only the abstract was published because it was laid open for public inspection, microfilmed, “diazo copies” were distributed to five suboffices having suitable reproduction equipment and the diazo copies were available for sale.). The contents of a foreign patent application should not be relied upon as prior art until the date of publication (i.e., the insertion into the laid open application) can be confirmed by an examiner’s review of a copy of the document. See MPEP § 901.05.

Jump to MPEP SourceNovelty / Prior ArtPublication of Board DecisionBoard Decision Types
Topic

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

2 rules
StatutoryInformativeAlways
[mpep-2127-cd3d94fa3f703133aecc690a]
Canceled Figures Available as Prior Art
Note:
Figures canceled from a Canadian patent application before issuance were available as prior art as of the date the application became publicly accessible.

Figures that had been canceled from a Canadian patent application before issuance of the patent were available as prior art under pre-AIA 35 U.S.C. 102(b) as of the date the application became publicly accessible. The patent at issue and its underlying application were available for public inspection at the Canadian Patent Office more than one year before the effective filing date of the claimed inventions in the patents in suit. Bruckelmyer v. Ground Heaters, Inc., 445 F.3d 1374, 78 USPQ2d 1684 (Fed. Cir. 2006).

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
StatutoryPermittedAlways
[mpep-2127-3b0c498857c18c63d69e70bd]
Specification Announced in Official Journal Constitutes Publication
Note:
If the specification is announced in an official journal and anyone can inspect or obtain copies, it satisfies the publication requirement under pre-AIA 35 U.S.C. 102(a) and (b).

When the specification is not issued in printed form but is announced in an official journal and anyone can inspect or obtain copies, it is sufficiently accessible to the public to constitute a “publication” within the meaning of 35 U.S.C. 102(a)(1) or pre-AIA 35 U.S.C. 102(a) and (b). See In re Wyer, 655 F.2d 221, 210 USPQ 790 (CCPA 1981).

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

Assignee as Applicant Signature

1 rules
StatutoryInformativeAlways
[mpep-2127-2a017d75236a1287616f1154]
Applicant’s Filing Date Before Patent Issue Date
Note:
The subject matter of an abandoned application can be used as prior art if the applicant's filing date precedes the issue date of a patent reference that incorporates it.

“An abandoned patent application may become evidence of prior art only when it has been appropriately disclosed, as, for example, when the abandoned patent [application] is reference[d] in the disclosure of another patent, in a publication, or by voluntary disclosure under [former Defensive Publication rule] 37 CFR 1.139 [Reserved].” Lee Pharmaceutical v. Kreps, 577 F.2d 610, 613, 198 USPQ 601, 605 (9th Cir. 1978). An abandoned patent application becomes available as prior art only as of the date the public gains access to it. See 37 CFR 1.14(a)(1)(ii) and (iv). However, the subject matter of an abandoned application, including both provisional and nonprovisional applications, referred to in a prior art U.S. patent or U.S. patent application publication may be relied on in a 35 U.S.C. 102(a)(2) or pre-AIA 35 U.S.C. 102(e) rejection based on that patent or patent application publication if the disclosure of the abandoned application is actually included or incorporated by reference in the patent or patent application publication. Compare In re Lund, 376 F.2d 982, 991, 153 USPQ 625, 633 (CCPA 1967) (The court reversed a rejection over a patent which was a continuation-in-part of an abandoned application. Applicant’s filing date preceded the issue date of the patent reference. The abandoned application contained subject matter which was essential to the rejection but which was not carried over into the continuation-in-part. The court held that the subject matter embodied in the canceled example 2 could not be relied on as of either parent or child filing date. Thus, the use of example 2 subject matter to reject the claims under pre-AIA 35 U.S.C. 102(e) was improper.). See also MPEP § 901.02. See MPEP § 2136.02 and MPEP § 2136.03 for the 35 U.S.C. 102(e) date of a U.S. patent claiming priority under 35 U.S.C. 119 or 35 U.S.C. 120. See MPEP § 2154 for prior art under 35 U.S.C. 102(a)(2).

Jump to MPEP Source · 37 CFR 1.139Assignee as Applicant SignatureApplicant and Assignee Filing Under AIAPre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Topic

Determining Whether Application Is AIA or Pre-AIA

1 rules
StatutoryInformativeAlways
[mpep-2127-6a03b209b81e2caf6a06409c]
Patent and Application Available for Public Inspection Before Effective Filing Date
Note:
The patent at issue and its underlying application must be available for public inspection at the Canadian Patent Office more than one year before the effective filing date of the claimed inventions.

Figures that had been canceled from a Canadian patent application before issuance of the patent were available as prior art under pre-AIA 35 U.S.C. 102(b) as of the date the application became publicly accessible. The patent at issue and its underlying application were available for public inspection at the Canadian Patent Office more than one year before the effective filing date of the claimed inventions in the patents in suit. Bruckelmyer v. Ground Heaters, Inc., 445 F.3d 1374, 78 USPQ2d 1684 (Fed. Cir. 2006).

Jump to MPEP SourceDetermining Whether Application Is AIA or Pre-AIAPre-AIA 102(b) – Statutory Bar (MPEP 2133)Determining AIA vs Pre-AIA Applicability (MPEP 2159)
Topic

Board Decision Types

1 rules
StatutoryProhibitedAlways
[mpep-2127-030241f3f2287c70cb372a1d]
Laid Open Patent Applications Are Not Published Prior Art
Note:
A board decision states that laid open patent applications do not constitute prior art and are not considered published.

One board decision, however, has held that laid open patent applications are not “published” and cannot constitute prior art. Ex parte Haller, 103 USPQ 332 (Bd. App. 1953). Whether or not a document is “published” for the purposes of 35 U.S.C. 102 and 35 U.S.C. 103 depends on how accessible the document is to the public. As technology has made reproduction of documents easier, the accessibility of the laid open applications has increased. Items provided in easily reproducible form have thus become “printed publications” as the phrase is used in 35 U.S.C. 102. In re Wyer, 655 F.2d 221, 226, 210 USPQ 790, 794 (CCPA 1981) (Laid open Australian patent application held to be a “printed publication” even though only the abstract was published because it was laid open for public inspection, microfilmed, “diazo copies” were distributed to five suboffices having suitable reproduction equipment and the diazo copies were available for sale.). The contents of a foreign patent application should not be relied upon as prior art until the date of publication (i.e., the insertion into the laid open application) can be confirmed by an examiner’s review of a copy of the document. See MPEP § 901.05.

Jump to MPEP SourceBoard Decision TypesBoard DecisionPTAB Jurisdiction
Topic

Double Patenting in Reissue

1 rules
StatutoryInformativeAlways
[mpep-2127-18c95dfc84b444cabe74d32b]
Claims Must Be Independent and Distinct
Note:
If claims in two applications are not independent and distinct, a provisional double patenting rejection is made.

As specified in 37 CFR 1.14(a), all pending U.S. patent applications are preserved in confidence except for published applications (see also 35 U.S.C. 122(b)), reissue applications, and applications in which a request to open the complete application to inspection by the public has been granted by the Office (37 CFR 1.11(b)). However, if an application that has not been published has an assignee or at least one inventor in common with the application being examined, a rejection will be proper in some circumstances. For instance, when the claims between the two applications are not independent or distinct, a provisional double patenting rejection is made. See MPEP § 804. If the copending applications differ by at least one joint inventor and at least one of the applications would have been obvious in view of the other, a provisional rejection over 35 U.S.C. 102(a)(2) or pre-AIA 35 U.S.C. 102(e) or 35 U.S.C. 103 is made when appropriate. See MPEP §§ 2136.01, 2146.03(a) and 2154.01(d).

Jump to MPEP Source · 37 CFR 1.14(a)Double Patenting in ReissuePre-AIA 102(d) – Foreign Patenting (MPEP 2135)Prior Art in Reissue
Topic

Prior Art in Reissue

1 rules
StatutoryInformativeAlways
[mpep-2127-246dc8ab07c76ac1c0e16cdb]
Provisional Rejection When Copending Applications Differ by Joint Inventor and Would Be Obvious
Note:
A provisional rejection is made when copending applications differ by at least one joint inventor and at least one application would have been obvious in view of the other, under 35 U.S.C. 102(a)(2), pre-AIA 35 U.S.C. 102(e), or 35 U.S.C. 103.

As specified in 37 CFR 1.14(a), all pending U.S. patent applications are preserved in confidence except for published applications (see also 35 U.S.C. 122(b)), reissue applications, and applications in which a request to open the complete application to inspection by the public has been granted by the Office (37 CFR 1.11(b)). However, if an application that has not been published has an assignee or at least one inventor in common with the application being examined, a rejection will be proper in some circumstances. For instance, when the claims between the two applications are not independent or distinct, a provisional double patenting rejection is made. See MPEP § 804. If the copending applications differ by at least one joint inventor and at least one of the applications would have been obvious in view of the other, a provisional rejection over 35 U.S.C. 102(a)(2) or pre-AIA 35 U.S.C. 102(e) or 35 U.S.C. 103 is made when appropriate. See MPEP §§ 2136.01, 2146.03(a) and 2154.01(d).

Jump to MPEP Source · 37 CFR 1.14(a)Prior Art in ReissueWho May File ReissuePrior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)

Citations

Primary topicCitation
35 U.S.C. 102 – Novelty / Prior Art
Board Decision Types
Publication of Board Decision
35 U.S.C. § 102
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
35 U.S.C. § 102(a)
35 U.S.C. 102 – Novelty / Prior Art
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
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)
35 U.S.C. § 102(a)(1)
35 U.S.C. 102 – Novelty / Prior Art
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Access to Abandoned Applications
Assignee as Applicant Signature
Double Patenting in Reissue
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)
Prior Art in Reissue
35 U.S.C. § 102(a)(2)
35 U.S.C. 102 – Novelty / Prior Art
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Determining Whether Application Is AIA or Pre-AIA
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)
35 U.S.C. § 102(b)
35 U.S.C. 102 – Novelty / Prior Art
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Access to Abandoned Applications
Assignee as Applicant Signature
Double Patenting in Reissue
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)
Prior Art in Reissue
35 U.S.C. § 102(e)
35 U.S.C. 102 – Novelty / Prior Art
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Board Decision Types
Double Patenting in Reissue
Prior Art in Reissue
Publication of Board Decision
35 U.S.C. § 103
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Access to Abandoned Applications
Assignee as Applicant Signature
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
35 U.S.C. § 119
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Access to Abandoned Applications
Assignee as Applicant Signature
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
35 U.S.C. § 120
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Double Patenting in Reissue
Prior Art in Reissue
35 U.S.C. § 122(b)
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Double Patenting in Reissue
Prior Art in Reissue
37 CFR § 1.11(b)
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Access to Abandoned Applications
Assignee as Applicant Signature
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
37 CFR § 1.139
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Double Patenting in Reissue
Prior Art in Reissue
37 CFR § 1.14(a)
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Access to Abandoned Applications
Assignee as Applicant Signature
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
37 CFR § 1.14(a)(1)(ii)
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Double Patenting in Reissue
Prior Art in Reissue
MPEP § 2136.01
35 U.S.C. 102 – Novelty / Prior Art
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Access to Abandoned Applications
Assignee as Applicant Signature
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)
MPEP § 2136.02
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Access to Abandoned Applications
Assignee as Applicant Signature
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
MPEP § 2136.03
35 U.S.C. 102 – Novelty / Prior Art
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Access to Abandoned Applications
Assignee as Applicant Signature
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)
MPEP § 2154
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Double Patenting in Reissue
Prior Art in Reissue
MPEP § 804
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Access to Abandoned Applications
Assignee as Applicant Signature
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
MPEP § 901.02
35 U.S.C. 102 – Novelty / Prior Art
Board Decision Types
Publication of Board Decision
MPEP § 901.05
Determining Whether Application Is AIA or Pre-AIA
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
Bruckelmyer v. Ground Heaters, Inc., 445 F.3d 1374, 78 USPQ2d 1684 (Fed. Cir. 2006)
35 U.S.C. 102 – Novelty / Prior Art
AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)
Access to Abandoned Applications
Assignee as Applicant Signature
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)
In re Lund, 376 F.2d 982, 153 USPQ 625 (CCPA 1967)
35 U.S.C. 102 – Novelty / Prior Art
Board Decision Types
Pre-AIA 102(d) – Foreign Patenting (MPEP 2135)
Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
Publication of Board Decision
In re Wyer, 655 F.2d 221, 226, 210 USPQ 790, 794 (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: 2026-01-10