MPEP § 1417 — Claim for Priority Under 35 U.S.C. 119(a)-(d) (Annotated Rules)

§1417 Claim for Priority Under 35 U.S.C. 119(a)-(d)

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

This page consolidates and annotates all enforceable requirements under MPEP § 1417, 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.

Claim for Priority Under 35 U.S.C. 119(a)-(d)

This section addresses Claim for Priority Under 35 U.S.C. 119(a)-(d). Primary authority: 35 U.S.C. 119(a), 37 CFR 1.76, and 37 CFR 1.63. Contains: 4 requirements, 1 guidance statement, 1 permission, and 1 other statement.

Key Rules

Topic

Foreign Priority Claim Requirements

2 rules
StatutoryRequiredAlways
[mpep-1417-df37ced249181e1d9c8763d4]
Foreign Priority Claim Must Be Made In Reissue
Note:
A claim for priority to an earlier filing date in a foreign country under 35 U.S.C. 119(a)-(d) must be made in a reissue application, even if previously claimed in the original patent application.

A claim for priority to an earlier filing date in a foreign country under 35 U.S.C. 119(a)-(d) must be made in a reissue application, even though such a claim was previously made in the application for the original patent to be reissued. However, no additional certified copy of the foreign application is necessary. See MPEP § 215. For reissue applications filed on or after September 16, 2012, the foreign priority information for the priority claim must be presented in an application data sheet (ADS) under 37 CFR 1.76. For applications filed prior to September 16, 2012, unless provided in an application data sheet, pre-AIA 37 CFR 1.63 requires that the oath or declaration must identify the foreign application for patent or inventor’s certificate for which priority is claimed under 37 CFR 1.55, and any foreign applications having a filing date before that of the application on which priority is claimed, by specifying the application number, country, day, month, and year of its filing. See MPEP § 214.01.

Jump to MPEP Source · 37 CFR 1.76Foreign Priority Claim RequirementsReissue Oath/Declaration ContentOrdering Certified Copies
StatutoryRequiredAlways
[mpep-1417-4e80d654e4177cf50d384538]
Priority Claim Must Be Repeated in Reissue Application
Note:
The claim for priority made during the original patent prosecution must be repeated in a reissue application to perfect foreign priority, requiring submission of a certified copy of the priority document.

A reissue was granted in Brenner v. State of Israel, 400 F.2d 789, 158 USPQ 584 (D.C. Cir. 1968), where the only ground urged was failure to file a certified copy of the original foreign application to obtain the right of foreign priority under 35 U.S.C. 119(a)-(d) before the patent was granted. In Brenner, the claim for priority had been made in the prosecution of the original patent, and it was only necessary to submit a certified copy of the priority document in the reissue application to perfect priority (the claim for priority must be repeated in the reissue application). Reissue is also available to correct the "error" in failing to take any steps to obtain the right of foreign priority under 35 U.S.C. 119(a) -(d) before the original patent was granted. See Fontijn v. Okamoto, 518 F.2d 610, 622, 186 USPQ 97, 106 (CCPA 1975) (“a patent may be reissued for the purpose of establishing a claim to priority which was not asserted, or which was not perfected during the prosecution of the original application”). In a situation where it is necessary to make a priority claim in a reissue application that was not made in the original patent, the reissue applicant will have to file a petition for an unintentionally delayed priority claim under 37 CFR 1.55(e) in addition to filing a reissue application. See MPEP § 214.02. See MPEP § 1481.03 for correction of a benefit claim via a certificate of correction.

Jump to MPEP Source · 37 CFR 1.55(e)Foreign Priority Claim RequirementsOrdering Certified CopiesCertified Copies of Documents
Topic

AIA Effective Dates

2 rules
StatutoryRequiredAlways
[mpep-1417-e017e91c9e32d13e18b2ba27]
Foreign Priority Information Must Be on ADS
Note:
For reissue applications filed on or after September 16, 2012, the foreign priority information must be presented in an application data sheet under 37 CFR 1.76.

A claim for priority to an earlier filing date in a foreign country under 35 U.S.C. 119(a)-(d) must be made in a reissue application, even though such a claim was previously made in the application for the original patent to be reissued. However, no additional certified copy of the foreign application is necessary. See MPEP § 215. For reissue applications filed on or after September 16, 2012, the foreign priority information for the priority claim must be presented in an application data sheet (ADS) under 37 CFR 1.76. For applications filed prior to September 16, 2012, unless provided in an application data sheet, pre-AIA 37 CFR 1.63 requires that the oath or declaration must identify the foreign application for patent or inventor’s certificate for which priority is claimed under 37 CFR 1.55, and any foreign applications having a filing date before that of the application on which priority is claimed, by specifying the application number, country, day, month, and year of its filing. See MPEP § 214.01.

Jump to MPEP Source · 37 CFR 1.76AIA Effective DatesAIA Overview and Effective DatesForeign Priority Claims
StatutoryRequiredAlways
[mpep-1417-b67ffecf8c62243742c7a32f]
Oath or Declaration Must Identify Foreign Priority Applications
Note:
For applications filed before September 16, 2012, the oath or declaration must identify foreign priority applications and any prior foreign filings by specifying their details.

A claim for priority to an earlier filing date in a foreign country under 35 U.S.C. 119(a)-(d) must be made in a reissue application, even though such a claim was previously made in the application for the original patent to be reissued. However, no additional certified copy of the foreign application is necessary. See MPEP § 215. For reissue applications filed on or after September 16, 2012, the foreign priority information for the priority claim must be presented in an application data sheet (ADS) under 37 CFR 1.76. For applications filed prior to September 16, 2012, unless provided in an application data sheet, pre-AIA 37 CFR 1.63 requires that the oath or declaration must identify the foreign application for patent or inventor’s certificate for which priority is claimed under 37 CFR 1.55, and any foreign applications having a filing date before that of the application on which priority is claimed, by specifying the application number, country, day, month, and year of its filing. See MPEP § 214.01.

Jump to MPEP Source · 37 CFR 1.76AIA Effective DatesAIA Oath/Declaration Requirements (37 CFR 1.63)Pre-AIA Oath/Declaration Requirements
Topic

Foreign Priority Claims

2 rules
StatutoryRecommendedAlways
[mpep-1417-f27840f4b308e9ef9668de03]
Bib-data Sheet Must Accurately List Foreign Priority Applications
Note:
The bibliographic data sheet must correctly list the application number, country, day, month, and year of each foreign application claiming priority from a U.S. application.

The examiner should note that foreign priority information on the front page of the patent will not be carried forward to the reissue from the original patent. Therefore, it is important that the bibliographic data (bib-data) sheet accurately list the application number, country (or intellectual property authority), day, month, and year of each foreign application to which the U.S. application is claiming priority. If there is a discrepancy between the bib-data sheet and the front page of the original patent, the examiner should notify the applicant in the next Office action of such discrepancy and advise the applicant to take appropriate corrective action (e.g., request a corrected filing receipt, file application data sheet in accordance with 37 CFR 1.76(c)). The examiner must also indicate in the Office action and on the bib-data sheet whether the conditions of 35 U.S.C. 119(a)-(d) or (f) have been met.

Jump to MPEP Source · 37 CFR 1.76(c))Foreign Priority ClaimsPriority and Benefit ClaimsForeign Priority Claim Requirements
StatutoryInformativeAlways
[mpep-1417-c8f9c759095de0049b1fbd61]
Reissue for Unperfected Foreign Priority
Note:
A reissue can correct the failure to obtain foreign priority under 35 U.S.C. 119(a)-(d) before the original patent was granted.

A reissue was granted in Brenner v. State of Israel, 400 F.2d 789, 158 USPQ 584 (D.C. Cir. 1968), where the only ground urged was failure to file a certified copy of the original foreign application to obtain the right of foreign priority under 35 U.S.C. 119(a)-(d) before the patent was granted. In Brenner, the claim for priority had been made in the prosecution of the original patent, and it was only necessary to submit a certified copy of the priority document in the reissue application to perfect priority (the claim for priority must be repeated in the reissue application). Reissue is also available to correct the "error" in failing to take any steps to obtain the right of foreign priority under 35 U.S.C. 119(a) -(d) before the original patent was granted. See Fontijn v. Okamoto, 518 F.2d 610, 622, 186 USPQ 97, 106 (CCPA 1975) (“a patent may be reissued for the purpose of establishing a claim to priority which was not asserted, or which was not perfected during the prosecution of the original application”). In a situation where it is necessary to make a priority claim in a reissue application that was not made in the original patent, the reissue applicant will have to file a petition for an unintentionally delayed priority claim under 37 CFR 1.55(e) in addition to filing a reissue application. See MPEP § 214.02. See MPEP § 1481.03 for correction of a benefit claim via a certificate of correction.

Jump to MPEP Source · 37 CFR 1.55(e)Foreign Priority ClaimsGrounds for ReissuePriority and Benefit Claims
Topic

Corrective Office Action

1 rules
StatutoryRecommendedAlways
[mpep-1417-fdc5ae87ddcf08d879ad7fd5]
Examiner Must Notify Applicant of Bib-data Sheet Discrepancies
Note:
The examiner must notify the applicant if there is a discrepancy between the bib-data sheet and the front page of the original patent and advise on corrective actions.

The examiner should note that foreign priority information on the front page of the patent will not be carried forward to the reissue from the original patent. Therefore, it is important that the bibliographic data (bib-data) sheet accurately list the application number, country (or intellectual property authority), day, month, and year of each foreign application to which the U.S. application is claiming priority. If there is a discrepancy between the bib-data sheet and the front page of the original patent, the examiner should notify the applicant in the next Office action of such discrepancy and advise the applicant to take appropriate corrective action (e.g., request a corrected filing receipt, file application data sheet in accordance with 37 CFR 1.76(c)). The examiner must also indicate in the Office action and on the bib-data sheet whether the conditions of 35 U.S.C. 119(a)-(d) or (f) have been met.

Jump to MPEP Source · 37 CFR 1.76(c))Corrective Office ActionTypes of Office ActionsExaminer's Action (37 CFR 1.104)
Topic

Types of Office Actions

1 rules
StatutoryRequiredAlways
[mpep-1417-878b93506bee809ba9d364ff]
Examiner Must Indicate 119(a)-(d) or (f) Compliance
Note:
The examiner must specify in the Office action and bib-data sheet whether the conditions of 35 U.S.C. 119(a)-(d) or (f) have been met for claiming foreign priority.

The examiner should note that foreign priority information on the front page of the patent will not be carried forward to the reissue from the original patent. Therefore, it is important that the bibliographic data (bib-data) sheet accurately list the application number, country (or intellectual property authority), day, month, and year of each foreign application to which the U.S. application is claiming priority. If there is a discrepancy between the bib-data sheet and the front page of the original patent, the examiner should notify the applicant in the next Office action of such discrepancy and advise the applicant to take appropriate corrective action (e.g., request a corrected filing receipt, file application data sheet in accordance with 37 CFR 1.76(c)). The examiner must also indicate in the Office action and on the bib-data sheet whether the conditions of 35 U.S.C. 119(a)-(d) or (f) have been met.

Jump to MPEP Source · 37 CFR 1.76(c))Types of Office ActionsExaminer's Action (37 CFR 1.104)Examination Procedures
Topic

Ordering Certified Copies

1 rules
StatutoryInformativeAlways
[mpep-1417-2f7f71829f9b00eba246addb]
Requirement for Filing Certified Copy of Foreign Application in Reissue
Note:
The rule requires filing a certified copy of the original foreign application to obtain foreign priority in a reissue application.

A reissue was granted in Brenner v. State of Israel, 400 F.2d 789, 158 USPQ 584 (D.C. Cir. 1968), where the only ground urged was failure to file a certified copy of the original foreign application to obtain the right of foreign priority under 35 U.S.C. 119(a)-(d) before the patent was granted. In Brenner, the claim for priority had been made in the prosecution of the original patent, and it was only necessary to submit a certified copy of the priority document in the reissue application to perfect priority (the claim for priority must be repeated in the reissue application). Reissue is also available to correct the "error" in failing to take any steps to obtain the right of foreign priority under 35 U.S.C. 119(a) -(d) before the original patent was granted. See Fontijn v. Okamoto, 518 F.2d 610, 622, 186 USPQ 97, 106 (CCPA 1975) (“a patent may be reissued for the purpose of establishing a claim to priority which was not asserted, or which was not perfected during the prosecution of the original application”). In a situation where it is necessary to make a priority claim in a reissue application that was not made in the original patent, the reissue applicant will have to file a petition for an unintentionally delayed priority claim under 37 CFR 1.55(e) in addition to filing a reissue application. See MPEP § 214.02. See MPEP § 1481.03 for correction of a benefit claim via a certificate of correction.

Jump to MPEP Source · 37 CFR 1.55(e)Ordering Certified CopiesForeign Priority ClaimsCertified Copies of Documents
Topic

Petition for Delayed Priority Claim

1 rules
StatutoryPermittedAlways
[mpep-1417-dd722af7479f845a1b1a2d55]
Reissue for Unperfected Priority Claim Requires Petition
Note:
A reissue application must include a petition for an unintentionally delayed priority claim if the original patent did not assert or perfect a priority claim.

A reissue was granted in Brenner v. State of Israel, 400 F.2d 789, 158 USPQ 584 (D.C. Cir. 1968), where the only ground urged was failure to file a certified copy of the original foreign application to obtain the right of foreign priority under 35 U.S.C. 119(a)-(d) before the patent was granted. In Brenner, the claim for priority had been made in the prosecution of the original patent, and it was only necessary to submit a certified copy of the priority document in the reissue application to perfect priority (the claim for priority must be repeated in the reissue application). Reissue is also available to correct the "error" in failing to take any steps to obtain the right of foreign priority under 35 U.S.C. 119(a) -(d) before the original patent was granted. See Fontijn v. Okamoto, 518 F.2d 610, 622, 186 USPQ 97, 106 (CCPA 1975) (“a patent may be reissued for the purpose of establishing a claim to priority which was not asserted, or which was not perfected during the prosecution of the original application”). In a situation where it is necessary to make a priority claim in a reissue application that was not made in the original patent, the reissue applicant will have to file a petition for an unintentionally delayed priority claim under 37 CFR 1.55(e) in addition to filing a reissue application. See MPEP § 214.02. See MPEP § 1481.03 for correction of a benefit claim via a certificate of correction.

Jump to MPEP Source · 37 CFR 1.55(e)Petition for Delayed Priority ClaimUnintentional Delay StandardNot Grounds for Reissue

Citations

Primary topicCitation
AIA Effective Dates
Corrective Office Action
Foreign Priority Claim Requirements
Foreign Priority Claims
Ordering Certified Copies
Petition for Delayed Priority Claim
Types of Office Actions
35 U.S.C. § 119(a)
AIA Effective Dates
Foreign Priority Claim Requirements
37 CFR § 1.55
Foreign Priority Claim Requirements
Foreign Priority Claims
Ordering Certified Copies
Petition for Delayed Priority Claim
37 CFR § 1.55(e)
AIA Effective Dates
Foreign Priority Claim Requirements
37 CFR § 1.63
AIA Effective Dates
Foreign Priority Claim Requirements
37 CFR § 1.76
Corrective Office Action
Foreign Priority Claims
Types of Office Actions
37 CFR § 1.76(c)
Foreign Priority Claim Requirements
Foreign Priority Claims
Ordering Certified Copies
Petition for Delayed Priority Claim
MPEP § 1481.03
AIA Effective Dates
Foreign Priority Claim Requirements
MPEP § 214.01
Foreign Priority Claim Requirements
Foreign Priority Claims
Ordering Certified Copies
Petition for Delayed Priority Claim
MPEP § 214.02
AIA Effective Dates
Foreign Priority Claim Requirements
MPEP § 215
Foreign Priority Claim Requirements
Foreign Priority Claims
Ordering Certified Copies
Petition for Delayed Priority Claim
See Fontijn v. Okamoto, 518 F.2d 610, 622, 186 USPQ 97, 106 (CCPA 1975)

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