MPEP § 2250.02 — Correction of Inventorship (Annotated Rules)

§2250.02 Correction of Inventorship

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

This page consolidates and annotates all enforceable requirements under MPEP § 2250.02, 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.

Correction of Inventorship

This section addresses Correction of Inventorship. Primary authority: 35 U.S.C. 251, 37 CFR 1.324, and 37 CFR 1.530(l)(1). Contains: 1 requirement, 1 permission, and 4 other statements.

Key Rules

Topic

Reexamination Certificate

4 rules
StatutoryInformativeAlways
[mpep-2250-02-65e2face831e5bda2f956acc]
Reexamination Certificate Contains Inventorship Change
Note:
If the petition under 37 CFR 1.324 is granted, a certificate of correction will not be issued as the reexamination certificate will contain the appropriate change of inventorship information.

Where the inventorship of a patent being reexamined is to be corrected, a petition for correction of inventorship which complies with 37 CFR 1.324 must be submitted during the prosecution of the reexamination proceeding. See 37 CFR 1.530(l)(1). If the petition under 37 CFR 1.324 is granted, a certificate of correction indicating the change of inventorship will not be issued, because the reexamination certificate that will ultimately issue will contain the appropriate change of inventorship information. The certificate of correction is in effect merged with the reexamination certificate.

Jump to MPEP Source · 37 CFR 1.324Reexamination CertificateConclusion of Ex Parte ReexaminationEx Parte Reexamination
StatutoryInformativeAlways
[mpep-2250-02-c7a62665593d6786b222f60a]
Certificate of Correction Merged with Reexamination Certificate
Note:
When inventorship is corrected during reexamination, the certificate of correction is merged into the reexamination certificate and no separate certificate will be issued.

Where the inventorship of a patent being reexamined is to be corrected, a petition for correction of inventorship which complies with 37 CFR 1.324 must be submitted during the prosecution of the reexamination proceeding. See 37 CFR 1.530(l)(1). If the petition under 37 CFR 1.324 is granted, a certificate of correction indicating the change of inventorship will not be issued, because the reexamination certificate that will ultimately issue will contain the appropriate change of inventorship information. The certificate of correction is in effect merged with the reexamination certificate.

Jump to MPEP Source · 37 CFR 1.324Reexamination CertificateConclusion of Ex Parte ReexaminationMerged Reexamination Proceedings
StatutoryInformativeAlways
[mpep-2250-02-3556ab468d218c0ede7f1dbc]
Reexamination Not Resulting in Certificate
Note:
Patent owner can request inventorship correction if reexamination does not result in a certificate under 37 CFR 1.570 or 1.997.

In some instances, the reexamination proceeding concludes but does not result in a reexamination certificate under 37 CFR 1.570 or 1.997, e.g., reexamination is vacated, or the order for reexamination is denied. In those instances, patent owner may, after the conclusion of the reexamination proceeding, request that the inventorship be corrected by a certificate of correction indicating the change of inventorship. See 37 CFR 1.530(l)(2). Alternatively, the failure to name the correct inventive entity is an error in the patent which is correctable by reissue under 35 U.S.C. 251. See MPEP § 1412.04 for a discussion of when correction of inventorship by reissue is appropriate.

Jump to MPEP Source · 37 CFR 1.570Reexamination CertificateReissue and ReexaminationConclusion of Ex Parte Reexamination
StatutoryPermittedAlways
[mpep-2250-02-fa23fa258eae248a21133a68]
Patent Owner May Request Inventorship Change After Reexamination
Note:
After the reexamination proceeding concludes without a reexamination certificate, patent owner may request inventorship correction through a certificate of correction.

In some instances, the reexamination proceeding concludes but does not result in a reexamination certificate under 37 CFR 1.570 or 1.997, e.g., reexamination is vacated, or the order for reexamination is denied. In those instances, patent owner may, after the conclusion of the reexamination proceeding, request that the inventorship be corrected by a certificate of correction indicating the change of inventorship. See 37 CFR 1.530(l)(2). Alternatively, the failure to name the correct inventive entity is an error in the patent which is correctable by reissue under 35 U.S.C. 251. See MPEP § 1412.04 for a discussion of when correction of inventorship by reissue is appropriate.

Jump to MPEP Source · 37 CFR 1.570Reexamination CertificateResponses and AmendmentsReissue and Reexamination
Topic

Patent Owner Statement

1 rules
StatutoryRequiredAlways
[mpep-2250-02-fd4cf35a0277013a08c91fd3]
Petition for Correcting Inventorship During Reexamination Must Comply with 37 CFR 1.324
Note:
A petition to correct inventorship during a reexamination must comply with the requirements of 37 CFR 1.324 and will be reflected in the reexamination certificate.

Where the inventorship of a patent being reexamined is to be corrected, a petition for correction of inventorship which complies with 37 CFR 1.324 must be submitted during the prosecution of the reexamination proceeding. See 37 CFR 1.530(l)(1). If the petition under 37 CFR 1.324 is granted, a certificate of correction indicating the change of inventorship will not be issued, because the reexamination certificate that will ultimately issue will contain the appropriate change of inventorship information. The certificate of correction is in effect merged with the reexamination certificate.

Jump to MPEP Source · 37 CFR 1.324Patent Owner StatementEx Parte ReexaminationResponses and Amendments
Topic

Grounds for Reissue

1 rules
StatutoryInformativeAlways
[mpep-2250-02-0a688f52e05f9eddffd5318b]
Failure to Name Correct Inventive Entity Is Correctable by Reissue
Note:
The failure to name the correct inventive entity in a patent can be corrected through reissue under 35 U.S.C. 251.

In some instances, the reexamination proceeding concludes but does not result in a reexamination certificate under 37 CFR 1.570 or 1.997, e.g., reexamination is vacated, or the order for reexamination is denied. In those instances, patent owner may, after the conclusion of the reexamination proceeding, request that the inventorship be corrected by a certificate of correction indicating the change of inventorship. See 37 CFR 1.530(l)(2). Alternatively, the failure to name the correct inventive entity is an error in the patent which is correctable by reissue under 35 U.S.C. 251. See MPEP § 1412.04 for a discussion of when correction of inventorship by reissue is appropriate.

Jump to MPEP Source · 37 CFR 1.570Grounds for ReissueReissue Patent PracticeResponses and Amendments

Citations

Primary topicCitation
Grounds for Reissue
Reexamination Certificate
35 U.S.C. § 251
Patent Owner Statement
Reexamination Certificate
37 CFR § 1.324
Patent Owner Statement
Reexamination Certificate
37 CFR § 1.530(l)(1)
Grounds for Reissue
Reexamination Certificate
37 CFR § 1.530(l)(2)
Grounds for Reissue
Reexamination Certificate
37 CFR § 1.570
Grounds for Reissue
Reexamination Certificate
MPEP § 1412.04

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