MPEP § 1411.02 — New Matter (Annotated Rules)

§1411.02 New Matter

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

This page consolidates and annotates all enforceable requirements under MPEP § 1411.02, 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.

New Matter

This section addresses New Matter. Primary authority: 35 U.S.C. 251, 35 U.S.C. 112(a), and 35 U.S.C. 112. Contains: 1 requirement, 1 prohibition, 5 guidance statements, 1 permission, and 2 other statements.

Key Rules

Topic

Reissue Application Filing

5 rules
StatutoryInformativeAlways
[mpep-1411-02-9ecade3b89e85922017de55f]
Specification Must Exclude New Matter
Note:
The specification in a reissue application must not include new matter that is not present in the original patent.

New matter, that is, matter not present in the patent sought to be reissued, is excluded from a reissue application in accordance with 35 U.S.C. 251.

Jump to MPEP SourceReissue Application FilingGrounds for ReissueReissue Patent Practice
StatutoryRequiredAlways
[mpep-1411-02-95cd298408c964323e9bca97]
Reissue Application Claims Must Match Original Patent
Note:
The claims in a reissue application must cover the same subject matter as originally claimed in the patent, without introducing new matter.

The claims in the reissue application must be for subject matter which the applicant had the right to claim in the original patent. Any change in the patent made via the reissue application should be checked to ensure that it does not introduce new matter. Note that new matter may exist by virtue of the omission of a feature or of a step in a method. See United States Industrial Chemicals, Inc. v. Carbide & Carbon Chemicals Corp., 315 U.S. 668, 53 USPQ 6 (1942).

Jump to MPEP SourceReissue Application FilingReissue Claim RequirementsReissue Patent Practice
StatutoryRecommendedAlways
[mpep-1411-02-4d9a08ba8b41cd5b014a4309]
Reissue Application Must Not Introduce New Matter
Note:
The claims in the reissue application must not include new matter that the applicant did not originally have the right to claim.

The claims in the reissue application must be for subject matter which the applicant had the right to claim in the original patent. Any change in the patent made via the reissue application should be checked to ensure that it does not introduce new matter. Note that new matter may exist by virtue of the omission of a feature or of a step in a method. See United States Industrial Chemicals, Inc. v. Carbide & Carbon Chemicals Corp., 315 U.S. 668, 53 USPQ 6 (1942).

Jump to MPEP SourceReissue Application FilingReissue Patent PracticeReissue Claim Requirements
StatutoryPermittedAlways
[mpep-1411-02-f9a31efb94be92ce8304833a]
Omission of Features Can Introduce New Matter in Reissue Applications
Note:
The removal of a feature or step in a method can introduce new matter that the applicant may not have originally claimed, thus requiring careful review during reissue applications.

The claims in the reissue application must be for subject matter which the applicant had the right to claim in the original patent. Any change in the patent made via the reissue application should be checked to ensure that it does not introduce new matter. Note that new matter may exist by virtue of the omission of a feature or of a step in a method. See United States Industrial Chemicals, Inc. v. Carbide & Carbon Chemicals Corp., 315 U.S. 668, 53 USPQ 6 (1942).

Jump to MPEP SourceReissue Application FilingReissue Claim RequirementsReissue Patent Practice
StatutoryInformativeAlways
[mpep-1411-02-ab9e67a1a86850040da44575]
Claims Must Not Introduce New Matter
Note:
The claims in a reissue application must not include new matter that the applicant did not have the right to claim in the original patent.

The claims in the reissue application must be for subject matter which the applicant had the right to claim in the original patent. Any change in the patent made via the reissue application should be checked to ensure that it does not introduce new matter. Note that new matter may exist by virtue of the omission of a feature or of a step in a method. See United States Industrial Chemicals, Inc. v. Carbide & Carbon Chemicals Corp., 315 U.S. 668, 53 USPQ 6 (1942).

Jump to MPEP SourceReissue Application FilingReissue Claim RequirementsReissue Patent Practice
Topic

New Matter Prohibition (MPEP 608.04)

3 rules
StatutoryProhibitedAlways
[mpep-1411-02-bd26078f32439ba312b20c20]
New Matter Prohibition In Reissue Applications
Note:
Prohibits adding new matter in any part of the reissue application as per 35 U.S.C. 251.

Form paragraph 14.22.01 may be used where new matter has been added anywhere in “the application for reissue” as prohibited by 35 U.S.C. 251. Guidance on whether a rejection under 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, should also be made if the new matter is added to the claims or is added to the specification and affects the claims is provided in MPEP §§ 2161 – 2163 and 2166. Guidance on whether an objection should be made based on new matter being added is provided in MPEP § 608.04(a).

Jump to MPEP SourceNew Matter Prohibition (MPEP 608.04)New Matter Objection Response35 U.S.C. 112(a) – Written Description & Enablement
StatutoryRecommendedAlways
[mpep-1411-02-50d66ac226322b3491c93148]
Rejection for Added New Matter in Claims or Specification
Note:
Guidance on whether to reject claims under 35 U.S.C. 112(a) when new matter is added to the claims or specification that affects them.

Form paragraph 14.22.01 may be used where new matter has been added anywhere in “the application for reissue” as prohibited by 35 U.S.C. 251. Guidance on whether a rejection under 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, should also be made if the new matter is added to the claims or is added to the specification and affects the claims is provided in MPEP §§ 2161 – 2163 and 2166. Guidance on whether an objection should be made based on new matter being added is provided in MPEP § 608.04(a).

Jump to MPEP SourceNew Matter Prohibition (MPEP 608.04)35 U.S.C. 112(a) – Written Description & EnablementDisclosure Requirements
StatutoryRecommendedAlways
[mpep-1411-02-2367de9b84c8b985bd501f1e]
Claims Must Be Supported by Specification
Note:
If new matter is added to the claims or specification and affects the claims, a rejection under 35 U.S.C. 112(a) should be made.

2. A rejection under 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, should also be made if the new matter is added to the claims or is added to the specification and affects the claims. If new matter is added to the specification and does not affect the claims, an objection should be made based upon 35 U.S.C. 132 using form paragraph 7.28.

35 U.S.C.New Matter Prohibition (MPEP 608.04)35 U.S.C. 112(a) – Written Description & EnablementDisclosure Requirements
Topic

New Matter Objection Response

2 rules
StatutoryRecommendedAlways
[mpep-1411-02-a1c3cb6cbe8f31f3eecc829a]
Objection for Added New Matter
Note:
Guidance on when to object if new matter is added in the application for reissue.

Form paragraph 14.22.01 may be used where new matter has been added anywhere in “the application for reissue” as prohibited by 35 U.S.C. 251. Guidance on whether a rejection under 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, should also be made if the new matter is added to the claims or is added to the specification and affects the claims is provided in MPEP §§ 2161 – 2163 and 2166. Guidance on whether an objection should be made based on new matter being added is provided in MPEP § 608.04(a).

Jump to MPEP SourceNew Matter Objection ResponseNew Matter Prohibition (MPEP 608.04)35 U.S.C. 112(a) – Written Description & Enablement
StatutoryRecommendedAlways
[mpep-1411-02-1d5f8e86cb0f738946b0201f]
Objection for New Matter Not Affecting Claims
Note:
If new matter is added to the specification but does not affect the claims, an objection should be made using form paragraph 7.28 under 35 U.S.C. 132.

2. A rejection under 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, should also be made if the new matter is added to the claims or is added to the specification and affects the claims. If new matter is added to the specification and does not affect the claims, an objection should be made based upon 35 U.S.C. 132 using form paragraph 7.28.

35 U.S.C.New Matter Objection ResponseNew Matter Prohibition (MPEP 608.04)35 U.S.C. 112(a) – Written Description & Enablement

Citations

Primary topicCitation
New Matter Objection Response
New Matter Prohibition (MPEP 608.04)
35 U.S.C. § 112
New Matter Objection Response
New Matter Prohibition (MPEP 608.04)
35 U.S.C. § 112(a)
New Matter Objection Response
New Matter Prohibition (MPEP 608.04)
35 U.S.C. § 132
New Matter Objection Response
New Matter Prohibition (MPEP 608.04)
Reissue Application Filing
35 U.S.C. § 251
New Matter Objection Response
New Matter Prohibition (MPEP 608.04)
MPEP § 2161
New Matter Objection Response
New Matter Prohibition (MPEP 608.04)
MPEP § 608.04(a)
New Matter Objection Response
New Matter Prohibition (MPEP 608.04)
Form Paragraph § 14.22.01
New Matter Objection Response
New Matter Prohibition (MPEP 608.04)
Form Paragraph § 7.28

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