MPEP § 1805 — Where To File an International Application (Annotated Rules)

§1805 Where To File an International Application

USPTO MPEP version: BlueIron's Update: 2025-12-31

This page consolidates and annotates all enforceable requirements under MPEP § 1805, 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.

Where To File an International Application

This section addresses Where To File an International Application. Primary authority: 35 U.S.C. 361, 35 U.S.C. 361(a), and 35 U.S.C. 371. Contains: 2 requirements, 1 prohibition, 8 permissions, and 5 other statements.

Key Rules

Topic

Article 19 Amendment Scope

10 rules
StatutoryInformativeAlways
[mpep-1805-8e5447f4165a7949b186f45e]
Transmittal to International Bureau as Receiving Office for Certain Applications
Note:
When an international application is filed with the United States Receiving Office in a non-accepted language or by an applicant without proper residence or nationality, it may be forwarded to the International Bureau for processing.

PCT Rule 19.4 provides for transmittal of an international application to the International Bureau as Receiving Office in certain instances. For example, when the international application is filed with the United States Receiving Office and the language in which the international application is filed is not accepted by the United States Receiving Office, or if the applicant does not have the requisite residence or nationality, the application may be forwarded to the International Bureau for processing in its capacity as a Receiving Office. See 37 CFR 1.412(c)(6). The Receiving Office of the International Bureau will consider the international application to be received as of the date accorded by the United States Receiving Office. This practice will avoid the loss of a filing date in those instances where the United States Receiving Office is not competent to act, but where the international application indicates an applicant to be a national or resident of a PCT Contracting state or is in a language accepted under PCT Rule 12.1(a) by the International Bureau as a Receiving Office. Where questions arise regarding residence or nationality, i.e., the U.S. is not clearly competent, the application will be forwarded to the International Bureau as Receiving Office. Note, where no residence or nationality is indicated, the U.S. is not competent, and the application will be forwarded to the International Bureau as Receiving Office so long as the necessary fee is paid. The fee is an amount equal to the transmittal fee.

Jump to MPEP Source · 37 CFR 1.412(c)(6)Article 19 Amendment ScopeArticle 19 Amendment TimingReceiving Office (RO/US)
StatutoryPermittedAlways
[mpep-1805-39957ccb5ae33c4d0160510a]
Requirement for Forwarding International Application to International Bureau
Note:
If the U.S. Receiving Office cannot accept the language of the international application or if the applicant lacks requisite residence or nationality, the application must be forwarded to the International Bureau for processing.

PCT Rule 19.4 provides for transmittal of an international application to the International Bureau as Receiving Office in certain instances. For example, when the international application is filed with the United States Receiving Office and the language in which the international application is filed is not accepted by the United States Receiving Office, or if the applicant does not have the requisite residence or nationality, the application may be forwarded to the International Bureau for processing in its capacity as a Receiving Office. See 37 CFR 1.412(c)(6). The Receiving Office of the International Bureau will consider the international application to be received as of the date accorded by the United States Receiving Office. This practice will avoid the loss of a filing date in those instances where the United States Receiving Office is not competent to act, but where the international application indicates an applicant to be a national or resident of a PCT Contracting state or is in a language accepted under PCT Rule 12.1(a) by the International Bureau as a Receiving Office. Where questions arise regarding residence or nationality, i.e., the U.S. is not clearly competent, the application will be forwarded to the International Bureau as Receiving Office. Note, where no residence or nationality is indicated, the U.S. is not competent, and the application will be forwarded to the International Bureau as Receiving Office so long as the necessary fee is paid. The fee is an amount equal to the transmittal fee.

Jump to MPEP Source · 37 CFR 1.412(c)(6)Article 19 Amendment ScopeNationals and ResidentsReceiving Office (RO/US)
StatutoryInformativeAlways
[mpep-1805-d151d512f3c72ebaed0b1e31]
Filing Date Determined by US Receiving Office for International Applications
Note:
The filing date of an international application is determined based on the date accorded by the United States Receiving Office, when forwarded to the International Bureau.

PCT Rule 19.4 provides for transmittal of an international application to the International Bureau as Receiving Office in certain instances. For example, when the international application is filed with the United States Receiving Office and the language in which the international application is filed is not accepted by the United States Receiving Office, or if the applicant does not have the requisite residence or nationality, the application may be forwarded to the International Bureau for processing in its capacity as a Receiving Office. See 37 CFR 1.412(c)(6). The Receiving Office of the International Bureau will consider the international application to be received as of the date accorded by the United States Receiving Office. This practice will avoid the loss of a filing date in those instances where the United States Receiving Office is not competent to act, but where the international application indicates an applicant to be a national or resident of a PCT Contracting state or is in a language accepted under PCT Rule 12.1(a) by the International Bureau as a Receiving Office. Where questions arise regarding residence or nationality, i.e., the U.S. is not clearly competent, the application will be forwarded to the International Bureau as Receiving Office. Note, where no residence or nationality is indicated, the U.S. is not competent, and the application will be forwarded to the International Bureau as Receiving Office so long as the necessary fee is paid. The fee is an amount equal to the transmittal fee.

Jump to MPEP Source · 37 CFR 1.412(c)(6)Article 19 Amendment ScopeNationals and ResidentsReceiving Office (RO/US)
StatutoryInformativeAlways
[mpep-1805-24710397428f359e2de8964c]
International Application Forwarded When US Office Is Incompetent
Note:
When the U.S. Receiving Office is not competent due to language or applicant qualifications, the international application is forwarded to the International Bureau for processing while preserving the filing date.

PCT Rule 19.4 provides for transmittal of an international application to the International Bureau as Receiving Office in certain instances. For example, when the international application is filed with the United States Receiving Office and the language in which the international application is filed is not accepted by the United States Receiving Office, or if the applicant does not have the requisite residence or nationality, the application may be forwarded to the International Bureau for processing in its capacity as a Receiving Office. See 37 CFR 1.412(c)(6). The Receiving Office of the International Bureau will consider the international application to be received as of the date accorded by the United States Receiving Office. This practice will avoid the loss of a filing date in those instances where the United States Receiving Office is not competent to act, but where the international application indicates an applicant to be a national or resident of a PCT Contracting state or is in a language accepted under PCT Rule 12.1(a) by the International Bureau as a Receiving Office. Where questions arise regarding residence or nationality, i.e., the U.S. is not clearly competent, the application will be forwarded to the International Bureau as Receiving Office. Note, where no residence or nationality is indicated, the U.S. is not competent, and the application will be forwarded to the International Bureau as Receiving Office so long as the necessary fee is paid. The fee is an amount equal to the transmittal fee.

Jump to MPEP Source · 37 CFR 1.412(c)(6)Article 19 Amendment ScopeInternational Filing DateNationals and Residents
StatutoryInformativeAlways
[mpep-1805-91293886ad74d69394ec9061]
Application Forwarded for Unclear Residency/Nationality
Note:
When questions arise about an applicant's residency or nationality, the application is sent to the International Bureau as Receiving Office.

PCT Rule 19.4 provides for transmittal of an international application to the International Bureau as Receiving Office in certain instances. For example, when the international application is filed with the United States Receiving Office and the language in which the international application is filed is not accepted by the United States Receiving Office, or if the applicant does not have the requisite residence or nationality, the application may be forwarded to the International Bureau for processing in its capacity as a Receiving Office. See 37 CFR 1.412(c)(6). The Receiving Office of the International Bureau will consider the international application to be received as of the date accorded by the United States Receiving Office. This practice will avoid the loss of a filing date in those instances where the United States Receiving Office is not competent to act, but where the international application indicates an applicant to be a national or resident of a PCT Contracting state or is in a language accepted under PCT Rule 12.1(a) by the International Bureau as a Receiving Office. Where questions arise regarding residence or nationality, i.e., the U.S. is not clearly competent, the application will be forwarded to the International Bureau as Receiving Office. Note, where no residence or nationality is indicated, the U.S. is not competent, and the application will be forwarded to the International Bureau as Receiving Office so long as the necessary fee is paid. The fee is an amount equal to the transmittal fee.

Jump to MPEP Source · 37 CFR 1.412(c)(6)Article 19 Amendment ScopeReceiving Office (RO/US)PCT Article 19 Amendments
StatutoryInformativeAlways
[mpep-1805-a1b7d929c9af61d7cdf6dbed]
Application Forwarded to International Bureau if No Residence/Nationality Indicated
Note:
If no residence or nationality is indicated, the U.S. will forward the international application to the International Bureau for processing.

PCT Rule 19.4 provides for transmittal of an international application to the International Bureau as Receiving Office in certain instances. For example, when the international application is filed with the United States Receiving Office and the language in which the international application is filed is not accepted by the United States Receiving Office, or if the applicant does not have the requisite residence or nationality, the application may be forwarded to the International Bureau for processing in its capacity as a Receiving Office. See 37 CFR 1.412(c)(6). The Receiving Office of the International Bureau will consider the international application to be received as of the date accorded by the United States Receiving Office. This practice will avoid the loss of a filing date in those instances where the United States Receiving Office is not competent to act, but where the international application indicates an applicant to be a national or resident of a PCT Contracting state or is in a language accepted under PCT Rule 12.1(a) by the International Bureau as a Receiving Office. Where questions arise regarding residence or nationality, i.e., the U.S. is not clearly competent, the application will be forwarded to the International Bureau as Receiving Office. Note, where no residence or nationality is indicated, the U.S. is not competent, and the application will be forwarded to the International Bureau as Receiving Office so long as the necessary fee is paid. The fee is an amount equal to the transmittal fee.

Jump to MPEP Source · 37 CFR 1.412(c)(6)Article 19 Amendment ScopeReceiving Office (RO/US)PCT Article 19 Amendments
StatutoryPermittedAlways
[mpep-1805-f678bfa355aa7bbed47cccce]
PCT Applicants May Directly File With International Bureau
Note:
Any resident or national of a PCT Contracting State can file their international application directly with the International Bureau as receiving office, especially when seeking to restore priority rights after missing the initial filing deadline.

Any applicant who is a resident or national of a PCT Contracting State may also file their application directly with the International Bureau as receiving Office. An applicant may wish to consider filing directly with the International Bureau as receiving Office instead of the United States Receiving Office in the situation where applicant is filing their international application after the expiration of the 12 month priority period but within two months of the expiration of the priority period, and where applicant desires to request restoration of the right of priority under the in spite of due care standard. See MPEP § 1828.01. An applicant may also request that an application be forwarded to the International Bureau for processing in its capacity as receiving Office in accordance with PCT Rule 19.4(a)(iii) in situations where the international application was filed with the United States Receiving Office after the expiration of the 12 month priority period but within two months of the expiration of the priority period, and where applicant desires to request restoration of the right of priority under the in spite of due care standard. However, any transfer request received after substantial processing of the international application by the United States Receiving Office has occurred may be declined.

Jump to MPEP SourceArticle 19 Amendment ScopeNationals and ResidentsReceiving Office (RO/US)
StatutoryPermittedAlways
[mpep-1805-770131a2ddab22ad50a38382]
Option to File Directly with International Bureau After Priority Period
Note:
An applicant may file their international application directly with the International Bureau within two months of the priority period expiration, if they wish to request restoration of right of priority under the in spite of due care standard.

Any applicant who is a resident or national of a PCT Contracting State may also file their application directly with the International Bureau as receiving Office. An applicant may wish to consider filing directly with the International Bureau as receiving Office instead of the United States Receiving Office in the situation where applicant is filing their international application after the expiration of the 12 month priority period but within two months of the expiration of the priority period, and where applicant desires to request restoration of the right of priority under the in spite of due care standard. See MPEP § 1828.01. An applicant may also request that an application be forwarded to the International Bureau for processing in its capacity as receiving Office in accordance with PCT Rule 19.4(a)(iii) in situations where the international application was filed with the United States Receiving Office after the expiration of the 12 month priority period but within two months of the expiration of the priority period, and where applicant desires to request restoration of the right of priority under the in spite of due care standard. However, any transfer request received after substantial processing of the international application by the United States Receiving Office has occurred may be declined.

Jump to MPEP SourceArticle 19 Amendment ScopeArticle 19 Amendment TimingNationals and Residents
StatutoryPermittedAlways
[mpep-1805-a0eaa526a4eb362805343d69]
Request for Priority Restoration After Deadline
Note:
An applicant may request that an application be forwarded to the International Bureau for processing if filed with the United States Receiving Office after the 12-month priority period but within two months, and desires restoration of right of priority under in spite of due care standard. However, such requests are declined if substantial processing has occurred.

Any applicant who is a resident or national of a PCT Contracting State may also file their application directly with the International Bureau as receiving Office. An applicant may wish to consider filing directly with the International Bureau as receiving Office instead of the United States Receiving Office in the situation where applicant is filing their international application after the expiration of the 12 month priority period but within two months of the expiration of the priority period, and where applicant desires to request restoration of the right of priority under the in spite of due care standard. See MPEP § 1828.01. An applicant may also request that an application be forwarded to the International Bureau for processing in its capacity as receiving Office in accordance with PCT Rule 19.4(a)(iii) in situations where the international application was filed with the United States Receiving Office after the expiration of the 12 month priority period but within two months of the expiration of the priority period, and where applicant desires to request restoration of the right of priority under the in spite of due care standard. However, any transfer request received after substantial processing of the international application by the United States Receiving Office has occurred may be declined.

Jump to MPEP SourceArticle 19 Amendment ScopeArticle 19 Amendment TimingNationals and Residents
StatutoryRequiredAlways
[mpep-1805-d7a7ea8d8773f079b3ec251e]
Foreign Filing License Unless Made In U.S. Or Prior Application Filed
Note:
An international application must have a foreign filing license unless the invention was not made in the U.S., or a prior U.S. national application was filed at least six months earlier and meets certain conditions.

An international application filed with, or forwarded to, the International Bureau must have a foreign filing license unless: (1) the invention was not made in the United States; or (2) a U.S. national application on the invention was filed at least six months prior to the filing of the international application, the U.S. national application is not subject to a secrecy order under 37 CFR 5.2, and the international application does not contain modifications, amendments, or supplements changing the general nature of the invention in a manner that would require any corresponding United States application to be or have been available for inspection under 35 U.S.C. 181. See 37 CFR 5.11 and 5.15.

Jump to MPEP Source · 37 CFR 5.2Article 19 Amendment ScopeEffect of International FilingNationals and Residents
Topic

Nationals and Residents

5 rules
StatutoryPermittedAlways
[mpep-1805-521b041d8f39071289dd7615]
International Application Filing Requirement for US Nationals/Residents
Note:
An international application can only be filed in the United States Receiving Office if at least one applicant is a resident or national of the United States.

Only if at least one of the applicants is a resident or national of the United States of America may an international application be filed in the United States Receiving Office. See PCT Article 9(1) and (3), PCT Rules 19.1 and 19.2, 35 U.S.C. 361(a) and 37 CFR 1.412(a) and 1.421. The concepts of residence and nationality are defined in PCT Rule 18.1.

Jump to MPEP Source · 37 CFR 1.412(a)Nationals and ResidentsReceiving Office (RO/US)PCT International Application Filing
StatutoryPermittedAlways
[mpep-1805-2c1bd82d451eb9f04209ded2]
PCT Papers May Be Hand-Delivered to USPTO
Note:
International applications and related papers may be hand-delivered to the United States Receiving Office by addressing them to ‘Mail Stop PCT’.

International applications may be filed electronically through the USPTO patent electronic filing system. International applications and related papers may also be deposited with the United States Receiving Office by addressing the papers to “Mail Stop PCT” and hand-delivering them to the Office. See MPEP § 501, subsection III for information regarding hand-delivery of papers. The mailing address for delivery by the U.S. Postal Service is: Mail Stop PCT, Commissioner for Patents, P.O. Box 1450, Alexandria, Virginia 22313-1450. It should be noted that the Priority Mail Express® provisions of 37 CFR 1.10 apply to the filing of all applications and papers filed in the U.S. Patent and Trademark Office, including PCT international applications and related papers and fees. It should be further noted, however, that PCT international applications and papers relating to international applications are specifically excluded from the Certificate of Mailing or Transmission procedures under 37 CFR 1.8. See MPEP § 1834, subsection III. If 37 CFR 1.8 is improperly used, the date to be accorded the paper will be the date of actual receipt in the Office unless the receipt date falls on a Saturday, Sunday, or federal holiday in which case the date of receipt will be the next succeeding day which is not a Saturday, Sunday, or federal holiday (37 CFR 1.6).

Jump to MPEP Source · 37 CFR 1.10Nationals and ResidentsReceiving Office (RO/US)PCT International Application Filing
StatutoryProhibitedAlways
[mpep-1805-d61bc645593027fb01906e6d]
Facsimile Transmission for Certain Papers in International Applications
Note:
Facsimile transmission may be used to submit certain papers but not the filing of an international application or color drawings.

Irrespective of the Certification practice under 37 CFR 1.8(a), facsimile transmission (without the benefit of the certificate under 37 CFR 1.8(a)) may be used to submit certain papers in international applications. However, facsimile transmission may not be used for the filing of an international application, the filing of color drawings under 37 CFR 1.437, or the filing of a copy of the international application and the basic national fee to enter the U.S. national stage under 35 U.S.C. 371. See 37 CFR 1.6(d)(3) and (4), 1.8(a)(2)(i)(D), and 1.8(a)(2)(i)(F). The Demand for international preliminary examination may be filed by facsimile transmission. See MPEP § 1834.01.

Jump to MPEP Source · 37 CFR 1.8(a)Nationals and ResidentsReceiving Office (RO/US)National Stage Entry Requirements
StatutoryInformativeAlways
[mpep-1805-0cd346a9184d5ecf0ab1fcdc]
PCT Requirements and Procedures Guidance Available
Note:
The United States Receiving Office and PCT Help Desk provide guidance on PCT requirements and procedures. Refer to MPEP § 1730 for contact information and additional resources.

The United States Receiving Office and PCT Help Desk are available to offer guidance on PCT requirements and procedures. See MPEP § 1730 for information on contacting the staff and other available means for obtaining information.

Jump to MPEP SourceNationals and ResidentsReceiving Office (RO/US)PCT International Application Filing
StatutoryRequiredAlways
[mpep-1805-01746fc2c85e63c45ab85a28]
Date of Actual Receipt for PCT Requests
Note:
PCT Rule 20.1(a) specifies marking the actual receipt date on the request, overriding the postal service deposit date authorized by U.S. patent law.

WARNING – although the United States patent law at 35 U.S.C. 21(a) authorizes the Director to prescribe by rule that any paper or fee required to be filed in the Patent and Trademark Office will be considered filed in the Office on the date on which it was deposited with the United States Postal Service, PCT Rule 20.1(a) provides for marking the “date of actual receipt on the request.” Although the Priority Mail Express® provisions under 37 CFR 1.10 have not been contested to date regarding PCT applications, applicants should be aware of a possible different interpretation by foreign authorities.

Jump to MPEP Source · 37 CFR 1.10Nationals and ResidentsRequest Content and FormPCT Request Form
Topic

Receiving Office (RO/US)

2 rules
StatutoryPermittedAlways
[mpep-1805-e37f00c36d0f6d6db76f2aa3]
Who Can File an International Application
Note:
The rule specifies who is permitted to file an international application according to MPEP § 1806.

See MPEP § 1806 as to who can file an international application.

Jump to MPEP SourceReceiving Office (RO/US)PCT International Application FilingPatent Cooperation Treaty
StatutoryInformativeAlways
[mpep-1805-88617866bbc7d16be524ad95]
Date of Actual Receipt Required for PCT Applications
Note:
The Director must mark the actual receipt date on PCT applications, despite potential different interpretations by foreign authorities.

WARNING – although the United States patent law at 35 U.S.C. 21(a) authorizes the Director to prescribe by rule that any paper or fee required to be filed in the Patent and Trademark Office will be considered filed in the Office on the date on which it was deposited with the United States Postal Service, PCT Rule 20.1(a) provides for marking the “date of actual receipt on the request.” Although the Priority Mail Express® provisions under 37 CFR 1.10 have not been contested to date regarding PCT applications, applicants should be aware of a possible different interpretation by foreign authorities.

Jump to MPEP Source · 37 CFR 1.10Receiving Office (RO/US)PCT International Application FilingNationals and Residents
Topic

Patent Cooperation Treaty

2 rules
StatutoryInformativeAlways
[mpep-1805-21c6f0e5bcdf041c70e54654]
Requirement for U.S. Resident or National Applicant to File International Application
Note:
An international application can only be filed in the United States Receiving Office if at least one of the applicants is a resident or national of the United States.

Only if at least one of the applicants is a resident or national of the United States of America may an international application be filed in the United States Receiving Office. See PCT Article 9(1) and (3), PCT Rules 19.1 and 19.2, 35 U.S.C. 361(a) and 37 CFR 1.412(a) and 1.421. The concepts of residence and nationality are defined in PCT Rule 18.1.

Jump to MPEP Source · 37 CFR 1.412(a)Patent Cooperation TreatyNationals and ResidentsReceiving Office (RO/US)
StatutoryInformativeAlways
[mpep-1805-cdd6056e7abf43e978734dfa]
Requirement for U.S. Resident or National Applicants
Note:
An international application can be filed in the United States Receiving Office if at least one applicant is a resident or national of the United States.

Only if at least one of the applicants is a resident or national of the United States of America may an international application be filed in the United States Receiving Office. See PCT Article 9(1) and (3), PCT Rules 19.1 and 19.2, 35 U.S.C. 361(a) and 37 CFR 1.412(a) and 1.421. The concepts of residence and nationality are defined in PCT Rule 18.1.

Jump to MPEP Source · 37 CFR 1.412(a)Patent Cooperation TreatyNationals and ResidentsReceiving Office (RO/US)
Topic

Certificate of Mailing

2 rules
StatutoryRecommendedAlways
[mpep-1805-838164f672bd5f4d85cb34d2]
Mailing Address for PCT Applications Excluded from Certificate of Mailing Procedures
Note:
The U.S. Patent and Trademark Office requires specific mailing address for PCT applications but excludes them from certificate of mailing procedures.

International applications may be filed electronically through the USPTO patent electronic filing system. International applications and related papers may also be deposited with the United States Receiving Office by addressing the papers to “Mail Stop PCT” and hand-delivering them to the Office. See MPEP § 501, subsection III for information regarding hand-delivery of papers. The mailing address for delivery by the U.S. Postal Service is: Mail Stop PCT, Commissioner for Patents, P.O. Box 1450, Alexandria, Virginia 22313-1450. It should be noted that the Priority Mail Express® provisions of 37 CFR 1.10 apply to the filing of all applications and papers filed in the U.S. Patent and Trademark Office, including PCT international applications and related papers and fees. It should be further noted, however, that PCT international applications and papers relating to international applications are specifically excluded from the Certificate of Mailing or Transmission procedures under 37 CFR 1.8. See MPEP § 1834, subsection III. If 37 CFR 1.8 is improperly used, the date to be accorded the paper will be the date of actual receipt in the Office unless the receipt date falls on a Saturday, Sunday, or federal holiday in which case the date of receipt will be the next succeeding day which is not a Saturday, Sunday, or federal holiday (37 CFR 1.6).

Jump to MPEP Source · 37 CFR 1.10Certificate of MailingPriority Claim in PCTRequest Content and Form
StatutoryInformativeAlways
[mpep-1805-ed96fd11973df9498f79c51b]
Date of Receipt Adjusted for Holidays
Note:
If the Certificate of Mailing is improperly used, the date of the paper will be adjusted to the next business day if received on a weekend or holiday.

International applications may be filed electronically through the USPTO patent electronic filing system. International applications and related papers may also be deposited with the United States Receiving Office by addressing the papers to “Mail Stop PCT” and hand-delivering them to the Office. See MPEP § 501, subsection III for information regarding hand-delivery of papers. The mailing address for delivery by the U.S. Postal Service is: Mail Stop PCT, Commissioner for Patents, P.O. Box 1450, Alexandria, Virginia 22313-1450. It should be noted that the Priority Mail Express® provisions of 37 CFR 1.10 apply to the filing of all applications and papers filed in the U.S. Patent and Trademark Office, including PCT international applications and related papers and fees. It should be further noted, however, that PCT international applications and papers relating to international applications are specifically excluded from the Certificate of Mailing or Transmission procedures under 37 CFR 1.8. See MPEP § 1834, subsection III. If 37 CFR 1.8 is improperly used, the date to be accorded the paper will be the date of actual receipt in the Office unless the receipt date falls on a Saturday, Sunday, or federal holiday in which case the date of receipt will be the next succeeding day which is not a Saturday, Sunday, or federal holiday (37 CFR 1.6).

Jump to MPEP Source · 37 CFR 1.10Certificate of MailingExpress Mail Filing Date
Topic

PCT International Application Filing

1 rules
StatutoryPermittedAlways
[mpep-1805-60b31d2aa7fbf7886605549d]
Electronically File International Applications with USPTO
Note:
International applications can be submitted electronically through the USPTO patent electronic filing system.

International applications may be filed electronically through the USPTO patent electronic filing system. International applications and related papers may also be deposited with the United States Receiving Office by addressing the papers to “Mail Stop PCT” and hand-delivering them to the Office. See MPEP § 501, subsection III for information regarding hand-delivery of papers. The mailing address for delivery by the U.S. Postal Service is: Mail Stop PCT, Commissioner for Patents, P.O. Box 1450, Alexandria, Virginia 22313-1450. It should be noted that the Priority Mail Express® provisions of 37 CFR 1.10 apply to the filing of all applications and papers filed in the U.S. Patent and Trademark Office, including PCT international applications and related papers and fees. It should be further noted, however, that PCT international applications and papers relating to international applications are specifically excluded from the Certificate of Mailing or Transmission procedures under 37 CFR 1.8. See MPEP § 1834, subsection III. If 37 CFR 1.8 is improperly used, the date to be accorded the paper will be the date of actual receipt in the Office unless the receipt date falls on a Saturday, Sunday, or federal holiday in which case the date of receipt will be the next succeeding day which is not a Saturday, Sunday, or federal holiday (37 CFR 1.6).

Jump to MPEP Source · 37 CFR 1.10PCT International Application FilingCertificate of MailingExpress Mail Filing Date
Topic

Article 34 Amendments

1 rules
StatutoryPermittedAlways
[mpep-1805-2cffaf478bcdcc0717a33024]
Facsimile Transmission Allowed for Demand
Note:
The demand for international preliminary examination can be filed by facsimile transmission.

Irrespective of the Certification practice under 37 CFR 1.8(a), facsimile transmission (without the benefit of the certificate under 37 CFR 1.8(a)) may be used to submit certain papers in international applications. However, facsimile transmission may not be used for the filing of an international application, the filing of color drawings under 37 CFR 1.437, or the filing of a copy of the international application and the basic national fee to enter the U.S. national stage under 35 U.S.C. 371. See 37 CFR 1.6(d)(3) and (4), 1.8(a)(2)(i)(D), and 1.8(a)(2)(i)(F). The Demand for international preliminary examination may be filed by facsimile transmission. See MPEP § 1834.01.

Jump to MPEP Source · 37 CFR 1.8(a)Article 34 AmendmentsDemand for Preliminary ExaminationInternational Preliminary Examination (Chapter II)
Topic

Priority Claim in PCT

1 rules
StatutoryRecommendedAlways
[mpep-1805-68b8b59db6428f8020d8b4be]
Priority Mail Express Considered Filed Date
Note:
Applicants should be aware that the filing date for Priority Mail Express under 37 CFR 1.10 may be interpreted differently by foreign authorities.

WARNING – although the United States patent law at 35 U.S.C. 21(a) authorizes the Director to prescribe by rule that any paper or fee required to be filed in the Patent and Trademark Office will be considered filed in the Office on the date on which it was deposited with the United States Postal Service, PCT Rule 20.1(a) provides for marking the “date of actual receipt on the request.” Although the Priority Mail Express® provisions under 37 CFR 1.10 have not been contested to date regarding PCT applications, applicants should be aware of a possible different interpretation by foreign authorities.

Jump to MPEP Source · 37 CFR 1.10Priority Claim in PCTPriority Mail ExpressCertificate of Mailing and Transmission
Topic

Article 19 Amendment Timing

1 rules
StatutoryInformativeAlways
[mpep-1805-ad2ec65e29e1bc7cbd5a23b9]
Transmittal Fee Requirement for PCT Applications
Note:
The fee must equal the transmittal fee when an international application is forwarded to the International Bureau as Receiving Office.

PCT Rule 19.4 provides for transmittal of an international application to the International Bureau as Receiving Office in certain instances. For example, when the international application is filed with the United States Receiving Office and the language in which the international application is filed is not accepted by the United States Receiving Office, or if the applicant does not have the requisite residence or nationality, the application may be forwarded to the International Bureau for processing in its capacity as a Receiving Office. See 37 CFR 1.412(c)(6). The Receiving Office of the International Bureau will consider the international application to be received as of the date accorded by the United States Receiving Office. This practice will avoid the loss of a filing date in those instances where the United States Receiving Office is not competent to act, but where the international application indicates an applicant to be a national or resident of a PCT Contracting state or is in a language accepted under PCT Rule 12.1(a) by the International Bureau as a Receiving Office. Where questions arise regarding residence or nationality, i.e., the U.S. is not clearly competent, the application will be forwarded to the International Bureau as Receiving Office. Note, where no residence or nationality is indicated, the U.S. is not competent, and the application will be forwarded to the International Bureau as Receiving Office so long as the necessary fee is paid. The fee is an amount equal to the transmittal fee.

Jump to MPEP Source · 37 CFR 1.412(c)(6)Article 19 Amendment TimingInternational Stage FeesPCT Fees
Topic

International Filing Date

1 rules
StatutoryInformativeAlways
[mpep-1805-2770d5c6d9f759cdfdbf8957]
International Filing Date Denied for Non-PCT Nationals
Note:
If all applicants are from non-PCT Contracting States, the application is denied an international filing date.

If all of the applicants are indicated to be residents and nationals of non-PCT Contracting States, PCT Rule 19.4 does not apply, and the application is denied an international filing date.

Jump to MPEP SourceInternational Filing DatePCT International Application FilingPatent Cooperation Treaty

Citations

Primary topicCitation
Article 19 Amendment Scope35 U.S.C. § 181
Nationals and Residents
Priority Claim in PCT
Receiving Office (RO/US)
35 U.S.C. § 21(a)
Nationals and Residents
Patent Cooperation Treaty
35 U.S.C. § 361(a)
Article 34 Amendments
Nationals and Residents
35 U.S.C. § 371
Certificate of Mailing
Nationals and Residents
PCT International Application Filing
Priority Claim in PCT
Receiving Office (RO/US)
37 CFR § 1.10
Nationals and Residents
Patent Cooperation Treaty
37 CFR § 1.412(a)
Article 19 Amendment Scope
Article 19 Amendment Timing
37 CFR § 1.412(c)(6)
Article 34 Amendments
Nationals and Residents
37 CFR § 1.437
Certificate of Mailing
Nationals and Residents
PCT International Application Filing
37 CFR § 1.6
Article 34 Amendments
Nationals and Residents
37 CFR § 1.6(d)(3)
Certificate of Mailing
Nationals and Residents
PCT International Application Filing
37 CFR § 1.8
Article 34 Amendments
Nationals and Residents
37 CFR § 1.8(a)
Article 19 Amendment Scope37 CFR § 5.11
Article 19 Amendment Scope37 CFR § 5.2
Nationals and ResidentsMPEP § 1730
Receiving Office (RO/US)MPEP § 1806
Article 19 Amendment ScopeMPEP § 1828.01
Certificate of Mailing
Nationals and Residents
PCT International Application Filing
MPEP § 1834
Article 34 Amendments
Nationals and Residents
MPEP § 1834.01
Certificate of Mailing
Nationals and Residents
PCT International Application Filing
MPEP § 501
Article 19 Amendment Scope
Article 19 Amendment Timing
PCT Rule 12.1(a)
Nationals and Residents
Patent Cooperation Treaty
PCT Rule 18.1
Article 19 Amendment Scope
Article 19 Amendment Timing
International Filing Date
Nationals and Residents
Patent Cooperation Treaty
PCT Rule 19.4(a)(iii)
Nationals and Residents
Priority Claim in PCT
Receiving Office (RO/US)
PCT Rule 20.1(a)
Nationals and Residents
Patent Cooperation Treaty
PCT Article 9(1)

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: 2025-12-31