MPEP § 608.04 — New Matter (Annotated Rules)

§608.04 New Matter

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

This page consolidates and annotates all enforceable requirements under MPEP § 608.04, 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. 112(a), 35 U.S.C. 132, and 35 U.S.C. 251. Contains: 2 requirements, 2 guidance statements, and 1 permission.

Key Rules

Topic

Components Required for Filing Date

2 rules
StatutoryPermittedAlways
[mpep-608-04-3bb15a756934ca54eff6759b]
Claims Can Support Specification
Note:
Applicant may rely on claims present on the filing date to support the specification if their content justifies it.

In establishing a disclosure, applicant may rely not only on the specification and drawing as filed but also on the claims present on the filing date of the application if their content justifies it. See MPEP § 608.01(l).

Jump to MPEP Source · 37 CFR 1.121Components Required for Filing DateFiling Date RequirementsPatent Application Content
StatutoryRequiredAlways
[mpep-608-04-de0de5af3acb59ae3ed8299e]
Specification Must Exclude New Matter
Note:
The specification must not include subject matter that was not present in the original filing, and claims affected by such new matter are rejected under 35 U.S.C. 112(a).

While amendments to the specification and claims involving new matter are ordinarily entered, such matter (i.e., subject matter not present in the specification, claims, or drawings on the application filing date) is required to be canceled from the descriptive portion of the specification, and the claims affected are rejected under 35 U.S.C. 112(a).

Jump to MPEP Source · 37 CFR 1.121Components Required for Filing DateFiling Date RequirementsPatent Application Content
Topic

No New Matter in Reissue

2 rules
StatutoryRecommendedAlways
[mpep-608-04-5a52d1a0eae730a6fb35009b]
Requirement for Canceling New Matter in Specification
Note:
Examiner must object to any new matter introduced into the specification and require its cancellation, ensuring claims are supported by original application description.

When new matter is introduced into the specification, the amendment should be objected to under 35 U.S.C. 132 (35 U.S.C. 251 if a reissue application) and a requirement made to cancel the new matter. The subject matter which is considered to be new matter must be clearly identified by the examiner. If the new matter has been entered into the claims or affects the scope of the claims, the claims affected should be rejected under 35 U.S.C. 112(a) because the new matter is not described in the application as originally filed.

Jump to MPEP Source · 37 CFR 1.121No New Matter in ReissueReissue Filing RequirementsAmendments in Reissue
StatutoryRequiredAlways
[mpep-608-04-62b984fc05ceaa20f6b890be]
Examiner Must Clearly Identify New Matter
Note:
The examiner must clearly identify any new matter introduced into the specification and object to it under 35 U.S.C. 132 or 251 if in a reissue application.

When new matter is introduced into the specification, the amendment should be objected to under 35 U.S.C. 132 (35 U.S.C. 251 if a reissue application) and a requirement made to cancel the new matter. The subject matter which is considered to be new matter must be clearly identified by the examiner. If the new matter has been entered into the claims or affects the scope of the claims, the claims affected should be rejected under 35 U.S.C. 112(a) because the new matter is not described in the application as originally filed.

Jump to MPEP Source · 37 CFR 1.121No New Matter in ReissueSupport in Original PatentReissue Filing Requirements
Topic

Reissue Filing Requirements

2 rules
StatutoryInformativeAlways
[mpep-608-04-60074a3e437b569c2ad609c8]
New Matter Requirement for Substitute Specification
Note:
The rule requires that any new matter added to a substitute specification must be consistent with the requirements outlined in MPEP § 608.01(q).

For new matter in reissue application, see MPEP § 1411.02. For new matter in substitute specification, see MPEP § 608.01(q). For new matter in a continuation or divisional application, see MPEP § 211.05.

Jump to MPEP Source · 37 CFR 1.121Reissue Filing RequirementsReissue Application FilingReissue Patent Practice
StatutoryInformativeAlways
[mpep-608-04-65e1d2d1eaf2f9f382448c30]
New Matter Requirement for Continuation Applications
Note:
The rule requires that new matter in a continuation application must be supported by the original specification and claims.

For new matter in reissue application, see MPEP § 1411.02. For new matter in substitute specification, see MPEP § 608.01(q). For new matter in a continuation or divisional application, see MPEP § 211.05.

Jump to MPEP Source · 37 CFR 1.121Reissue Filing RequirementsReissue Application FilingReissue Patent Practice
Topic

Support in Original Patent

1 rules
StatutoryRecommendedAlways
[mpep-608-04-8c52a2baaa603aefc7391d78]
Claims Must Reflect Original Description
Note:
If claims include new matter not described in the original application, they must be rejected under 35 U.S.C. 112(a).

When new matter is introduced into the specification, the amendment should be objected to under 35 U.S.C. 132 (35 U.S.C. 251 if a reissue application) and a requirement made to cancel the new matter. The subject matter which is considered to be new matter must be clearly identified by the examiner. If the new matter has been entered into the claims or affects the scope of the claims, the claims affected should be rejected under 35 U.S.C. 112(a) because the new matter is not described in the application as originally filed.

Jump to MPEP Source · 37 CFR 1.121Support in Original PatentNo New Matter in ReissueReissue Filing Requirements
Topic

Reissue Application Filing

1 rules
StatutoryInformativeAlways
[mpep-608-04-09c28ea5b895779d7eca78b6]
New Matter Requirement for Reissue Applications
Note:
This rule outlines the requirements for introducing new matter in reissue applications, directing to MPEP § 1411.02 for specific guidance.

For new matter in reissue application, see MPEP § 1411.02. For new matter in substitute specification, see MPEP § 608.01(q). For new matter in a continuation or divisional application, see MPEP § 211.05.

Jump to MPEP Source · 37 CFR 1.121Reissue Application FilingReissue Patent PracticeReissue Filing Requirements

Citations

Primary topicCitation
Components Required for Filing Date
No New Matter in Reissue
Support in Original Patent
35 U.S.C. § 112(a)
No New Matter in Reissue
Support in Original Patent
35 U.S.C. § 132
No New Matter in Reissue
Support in Original Patent
35 U.S.C. § 251
Reissue Application Filing
Reissue Filing Requirements
MPEP § 1411.02
Reissue Application Filing
Reissue Filing Requirements
MPEP § 211.05
Components Required for Filing DateMPEP § 608.01(l)
Reissue Application Filing
Reissue Filing Requirements
MPEP § 608.01(q)
MPEP § 608.02(h)
MPEP § 608.04(c)

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