MPEP § 2813.01 — Amendments (Annotated Rules)

§2813.01 Amendments

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

This page consolidates and annotates all enforceable requirements under MPEP § 2813.01, 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.

Amendments

This section addresses Amendments. Primary authority: 35 U.S.C. 257(a), 35 U.S.C. 304, and 35 U.S.C. 257(b). Contains: 1 prohibition and 5 permissions.

Key Rules

Topic

Amendments Adding New Matter

3 rules
StatutoryPermittedAlways
[mpep-2813-01-af258673eb8028dd94066528]
Amendments Allowed After Initial Office Action
Note:
Patent owners can submit amendments after an initial Office action in ex parte reexamination proceedings ordered under 35 U.S.C. 257.

An amendment may be submitted in an ex parte reexamination proceeding ordered under 35 U.S.C. 257. Patent owners, however, are reminded that 35 U.S.C. 257(b) expressly removes the right of the patent owner to file a statement under 35 U.S.C. 304, which includes any amendment that the patent owner may wish to file prior to an initial Office action on the merits. Because the ex parte reexamination proceeding does not exist prior to the order under 35 U.S.C. 257, and because the patent owner is precluded from filing a statement under 35 U.S.C. 304, no amendment may be filed from the time the request for supplemental examination is filed, until after the issuance of an initial Office action on the merits in any ex parte reexamination proceeding ordered under 35 U.S.C. 257.

Jump to MPEP Source · 37 CFR 1.620Amendments Adding New MatterOptional Amendment ContentReexamination Order
StatutoryPermittedAlways
[mpep-2813-01-af352405eb2b0c41259d72ad]
Amendments Not Allowed Before Initial Office Action in Ex Parte Reexamination
Note:
Patent owners cannot file amendments before the initial Office action on merits during an ex parte reexamination proceeding ordered under 35 U.S.C. 257.

An amendment may be submitted in an ex parte reexamination proceeding ordered under 35 U.S.C. 257. Patent owners, however, are reminded that 35 U.S.C. 257(b) expressly removes the right of the patent owner to file a statement under 35 U.S.C. 304, which includes any amendment that the patent owner may wish to file prior to an initial Office action on the merits. Because the ex parte reexamination proceeding does not exist prior to the order under 35 U.S.C. 257, and because the patent owner is precluded from filing a statement under 35 U.S.C. 304, no amendment may be filed from the time the request for supplemental examination is filed, until after the issuance of an initial Office action on the merits in any ex parte reexamination proceeding ordered under 35 U.S.C. 257.

Jump to MPEP Source · 37 CFR 1.620Amendments Adding New MatterFirst Office Action on MeritsExamination in Reexamination
StatutoryPermittedAlways
[mpep-2813-01-cc92db8cd1d2ff791a34cfe4]
No Amendment Before Initial Office Action
Note:
Patent owners cannot file amendments until after the initial Office action on the merits in an ex parte reexamination proceeding ordered under 35 U.S.C. 257.

An amendment may be submitted in an ex parte reexamination proceeding ordered under 35 U.S.C. 257. Patent owners, however, are reminded that 35 U.S.C. 257(b) expressly removes the right of the patent owner to file a statement under 35 U.S.C. 304, which includes any amendment that the patent owner may wish to file prior to an initial Office action on the merits. Because the ex parte reexamination proceeding does not exist prior to the order under 35 U.S.C. 257, and because the patent owner is precluded from filing a statement under 35 U.S.C. 304, no amendment may be filed from the time the request for supplemental examination is filed, until after the issuance of an initial Office action on the merits in any ex parte reexamination proceeding ordered under 35 U.S.C. 257.

Jump to MPEP Source · 37 CFR 1.620Amendments Adding New MatterFirst Office Action on MeritsOptional Amendment Content
Topic

Reexamination Order

2 rules
StatutoryPermittedAlways
[mpep-2813-01-a1fb3371ac1a4564d1d4f221]
Amendments Not Allowed In Supplemental Examination
Note:
Patent owners cannot file amendments in a supplemental examination proceeding.

37 CFR 1.620(f) provides that no amendment may be filed in a supplemental examination proceeding. Amendments are not “information believed to be relevant to the patent” under 35 U.S.C. 257(a) and a patent owner cannot file an amendment as part of a statement under 35 U.S.C. 304 because 35 U.S.C. 257(b) expressly excludes the filing of a statement pursuant to 35 U.S.C. 304 in a supplemental examination proceeding.

Jump to MPEP Source · 37 CFR 1.620(f)Reexamination OrderPatent Owner StatementEx Parte Reexamination
StatutoryProhibitedAlways
[mpep-2813-01-a69e5314f9cf817f2cf40d68]
Amendments Prohibited in Supplemental Examination Proceeding
Note:
A patent owner cannot file an amendment as part of a statement under 35 U.S.C. 304 during a supplemental examination proceeding.

37 CFR 1.620(f) provides that no amendment may be filed in a supplemental examination proceeding. Amendments are not “information believed to be relevant to the patent” under 35 U.S.C. 257(a) and a patent owner cannot file an amendment as part of a statement under 35 U.S.C. 304 because 35 U.S.C. 257(b) expressly excludes the filing of a statement pursuant to 35 U.S.C. 304 in a supplemental examination proceeding.

Jump to MPEP Source · 37 CFR 1.620(f)Reexamination OrderPatent Owner StatementEx Parte Reexamination
Topic
1 rules

Citations

Primary topicCitation
Consent of Assignee35 U.S.C. § 253
Amendments Adding New Matter35 U.S.C. § 257
Reexamination Order35 U.S.C. § 257(a)
Amendments Adding New Matter
Reexamination Order
35 U.S.C. § 257(b)
Amendments Adding New Matter
Reexamination Order
35 U.S.C. § 304
Consent of Assignee37 CFR § 1.321(a)
Reexamination Order37 CFR § 1.620(f)
Consent of AssigneeMPEP § 1490

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