MPEP § 2163.06 — Relationship of Written Description Requirement to New Matter (Annotated Rules)

§2163.06 Relationship of Written Description Requirement to New Matter

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

This page consolidates and annotates all enforceable requirements under MPEP § 2163.06, 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.

Relationship of Written Description Requirement to New Matter

This section addresses Relationship of Written Description Requirement to New Matter. Primary authority: 35 U.S.C. 132, 35 U.S.C. 251, and 35 U.S.C. 112(a). Contains: 1 requirement, 3 guidance statements, 1 permission, and 2 other statements.

Key Rules

Topic

No New Matter in Reissue

2 rules
StatutoryInformativeAlways
[mpep-2163-06-f3d1381553d42d251645b4a3]
Requirement for No New Matter in Reissue Amendments
Note:
Reissue amendments must not introduce new matter into the application.

There are two statutory provisions that prohibit the introduction of new matter. The first provision is 35 U.S.C. 132, which provides that no amendment shall introduce new matter into the disclosure of the invention. The second provision is 35 U.S.C. 251, which provides that no new matter shall be introduced into the application for reissue.

Jump to MPEP SourceNo New Matter in ReissueSupport in Original PatentAmendments in Reissue
StatutoryRequiredAlways
[mpep-2163-06-a6805de13fe64f573c50b0d9]
Requirement for No New Matter in Application for Reissue
Note:
The rule requires that no new matter be introduced into the application for reissue, aligning with the written description requirement.

There are two statutory provisions that prohibit the introduction of new matter. The first provision is 35 U.S.C. 132, which provides that no amendment shall introduce new matter into the disclosure of the invention. The second provision is 35 U.S.C. 251, which provides that no new matter shall be introduced into the application for reissue.

Jump to MPEP SourceNo New Matter in ReissueReissue Patent PracticeSupport in Original Patent
Topic

Amendments Adding New Matter

2 rules
StatutoryRecommendedAlways
[mpep-2163-06-733f43a8c730a3a98781dbd4]
Claims Must Be Rejected If Specification Adds New Matter
Note:
If the specification is amended to include new matter and any claim limitations are affected, claims must be rejected under 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph.

When the claims have not been amended, per se, but the specification has been amended to add new matter, a rejection of the claims under 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, should be made whenever any of the claim limitations are affected by the added material.

Jump to MPEP SourceAmendments Adding New MatterNew Matter Prohibition (MPEP 608.04)35 U.S.C. 112(a) – Written Description & Enablement
StatutoryInformativeAlways
[mpep-2163-06-5c13073ce7cba7daa5e1be0b]
Study Entire Application for New Matter
Note:
When filing an amendment in response to a 35 U.S.C. 112(a) objection, a thorough examination of the entire application is required to ensure no new matter is introduced.

When an amendment is filed in reply to an objection or rejection based on 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, a study of the entire application is often necessary to determine whether or not “new matter” is involved. Applicant should therefore specifically point out the support for any amendments made to the disclosure.

Jump to MPEP SourceAmendments Adding New MatterNew Matter Objection ResponseNew Matter Prohibition (MPEP 608.04)
Topic

PTAB Jurisdiction

2 rules
StatutoryPermittedAlways
[mpep-2163-06-9ee1d137b530c147d0a6cef0]
Determinative Objection Is Appealable to PTAB
Note:
When an objection is determinative of a rejection, such as indicating new matter in the disclosure, it can be appealed to the Patent Trial and Appeal Board.

While ordinarily an objection is petitionable, and a rejection is appealable, when the objection is "determinative of the rejection", such as the case where the examiner has indicated that the disclosure contains new matter, the matter may be addressed by the Patent Trial and Appeal Board. See MPEP § 1201. For instance, if the claims and specification or drawings contain new matter either directly or indirectly, and there has been both a rejection and objection by the examiner, the issue becomes appealable and should not be decided by petition.

Jump to MPEP SourcePTAB JurisdictionPTAB Contested Case ProceduresEx Parte Appeals to PTAB
StatutoryRecommendedAlways
[mpep-2163-06-6347b9aa5c4ccdb056c374ca]
Examiner Objection to New Matter Makes Appealable
Note:
When the examiner objects that new matter is present in the claims, specification, or drawings, and this objection is determinative of a rejection, the issue becomes appealable rather than decided by petition.

While ordinarily an objection is petitionable, and a rejection is appealable, when the objection is "determinative of the rejection", such as the case where the examiner has indicated that the disclosure contains new matter, the matter may be addressed by the Patent Trial and Appeal Board. See MPEP § 1201. For instance, if the claims and specification or drawings contain new matter either directly or indirectly, and there has been both a rejection and objection by the examiner, the issue becomes appealable and should not be decided by petition.

Jump to MPEP SourcePTAB JurisdictionPTAB Contested Case ProceduresEx Parte Appeals to PTAB
Topic

Patent Application Content

2 rules
MPEP GuidanceInformativeAlways
[mpep-2163-06-21a63b238d1ef1e0513ad679]
Specification Must Describe Invention Completely
Note:
An applicant must ensure any amendment to the abstract, specification, or drawings is already described in the application as filed to avoid introducing new matter.

Lack of written description is an issue that generally arises with respect to the subject matter of a claim. If an applicant amends or attempts to amend the abstract, specification or drawings of an application, an issue of new matter will arise if the content of the amendment is not described in the application as filed. Stated another way, information contained in any one of the specification, claims or drawings of the application as filed may be added to any other part of the application without introducing new matter.

Jump to MPEP SourcePatent Application ContentSpecification
MPEP GuidancePermittedAlways
[mpep-2163-06-988caaa4840000204464196b]
Specification Must Describe Invention Completely
Note:
The specification must fully describe the invention, and information from any part of the application (specification, claims, drawings) can be added to another part without introducing new matter.

Lack of written description is an issue that generally arises with respect to the subject matter of a claim. If an applicant amends or attempts to amend the abstract, specification or drawings of an application, an issue of new matter will arise if the content of the amendment is not described in the application as filed. Stated another way, information contained in any one of the specification, claims or drawings of the application as filed may be added to any other part of the application without introducing new matter.

Jump to MPEP SourcePatent Application ContentSpecification
Topic

Claim Subject Matter

2 rules
MPEP GuidancePermittedAlways
[mpep-2163-06-6d127dd059e33f11bebb4a30]
Original Claims as Part of Specification Disclosure
Note:
If an application includes claims for material not described in the rest of the specification, the applicant may amend the specification to include this claimed subject matter.

The claims as filed in the original specification are part of the disclosure and therefore, if an application as originally filed contains a claim disclosing material not disclosed in the remainder of the specification, the applicant may amend the specification to include the claimed subject matter. In re Benno, 768 F.2d 1340, 226 USPQ 683 (Fed. Cir. 1985). Form paragraph 7.44 may be used where originally claimed subject matter lacks proper antecedent basis in the specification. See MPEP § 608.01(o).

Jump to MPEP SourceClaim Subject MatterPatent Application Content
MPEP GuidancePermittedAlways
[mpep-2163-06-2032e72e45153ee988d132a6]
Proper Antecedent Basis for Claimed Subject Matter
Note:
Amendments to the specification may be made where originally claimed subject matter lacks proper antecedent basis, allowing for the inclusion of new claim elements not previously described in detail.

The claims as filed in the original specification are part of the disclosure and therefore, if an application as originally filed contains a claim disclosing material not disclosed in the remainder of the specification, the applicant may amend the specification to include the claimed subject matter. In re Benno, 768 F.2d 1340, 226 USPQ 683 (Fed. Cir. 1985). Form paragraph 7.44 may be used where originally claimed subject matter lacks proper antecedent basis in the specification. See MPEP § 608.01(o).

Jump to MPEP SourceClaim Subject MatterPatent Application Content
Topic

Support in Original Patent

1 rules
StatutoryRequiredAlways
[mpep-2163-06-e26c46991584b9016d4f77d1]
Amendment Must Not Introduce New Matter into Disclosure of Invention
Note:
The rule requires that no amendment to a patent application should add new information not originally disclosed in the invention's description.

There are two statutory provisions that prohibit the introduction of new matter. The first provision is 35 U.S.C. 132, which provides that no amendment shall introduce new matter into the disclosure of the invention. The second provision is 35 U.S.C. 251, which provides that no new matter shall be introduced into the application for reissue.

Jump to MPEP SourceSupport in Original PatentNo New Matter in ReissueAmendments in Reissue
Topic

New Matter Objection Response

1 rules
StatutoryRecommendedAlways
[mpep-2163-06-c944e522617eb96349a9c2a0]
Examiner Must Object to New Matter Added to Disclosure
Note:
The examiner should object if new subject matter is added to the abstract, specification, or drawings and require applicant to cancel it.

If new subject matter is added to the disclosure, whether it be in the abstract, the specification, or the drawings, the examiner should object to the introduction of new matter under 35 U.S.C. 132 or 251 as appropriate, and require applicant to cancel the new matter. If new matter is added to the claims, the examiner should reject the claims under 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph – written description requirement. In re Rasmussen, 650 F.2d 1212, 211 USPQ 323 (CCPA 1981). The examiner should still consider the subject matter added to the claim in making rejections based on prior art since the new matter rejection may be overcome by applicant.

Jump to MPEP SourceNew Matter Objection ResponseRejections Specific to ReissueNew Matter Prohibition (MPEP 608.04)
Topic

Rejections Specific to Reissue

1 rules
StatutoryRecommendedAlways
[mpep-2163-06-494f184406ca4cb78a202776]
Claims Must Support Added Subject Matter
Note:
Examiner should reject claims under the written description requirement if new subject matter is added, even if it improves prior art rejections.

If new subject matter is added to the disclosure, whether it be in the abstract, the specification, or the drawings, the examiner should object to the introduction of new matter under 35 U.S.C. 132 or 251 as appropriate, and require applicant to cancel the new matter. If new matter is added to the claims, the examiner should reject the claims under 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph – written description requirement. In re Rasmussen, 650 F.2d 1212, 211 USPQ 323 (CCPA 1981). The examiner should still consider the subject matter added to the claim in making rejections based on prior art since the new matter rejection may be overcome by applicant.

Jump to MPEP SourceRejections Specific to ReissueNew Matter Prohibition (MPEP 608.04)35 U.S.C. 112(a) – Written Description & Enablement
Topic

Prior Art in Reissue

1 rules
StatutoryRecommendedAlways
[mpep-2163-06-0f9114fd5b50453ec4bc943a]
Examiner Must Consider Added Claim Matter During Prior Art Rejections
Note:
The examiner should evaluate claims with newly added subject matter during prior art rejections, as these can be overcome by the applicant.

If new subject matter is added to the disclosure, whether it be in the abstract, the specification, or the drawings, the examiner should object to the introduction of new matter under 35 U.S.C. 132 or 251 as appropriate, and require applicant to cancel the new matter. If new matter is added to the claims, the examiner should reject the claims under 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph – written description requirement. In re Rasmussen, 650 F.2d 1212, 211 USPQ 323 (CCPA 1981). The examiner should still consider the subject matter added to the claim in making rejections based on prior art since the new matter rejection may be overcome by applicant.

Jump to MPEP SourcePrior Art in ReissueNew Matter Prohibition (MPEP 608.04)Assignee as Applicant Signature
Topic

Assignee as Applicant Signature

1 rules
StatutoryRecommendedAlways
[mpep-2163-06-bffc46e9d2025f57c161685f]
Support for Amendments Must Be Pointed Out
Note:
Applicant must specifically indicate the support in the disclosure for any amendments made to address objections or rejections under 35 U.S.C. 112(a).

When an amendment is filed in reply to an objection or rejection based on 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, a study of the entire application is often necessary to determine whether or not “new matter” is involved. Applicant should therefore specifically point out the support for any amendments made to the disclosure.

Jump to MPEP SourceAssignee as Applicant SignatureApplicant and Assignee Filing Under AIASupport in Original Disclosure (MPEP 2163.06)
Topic

Claims

1 rules
MPEP GuidanceInformativeAlways
[mpep-2163-06-1b7e8784451ad9ada4665eff]
Specification Must Describe Invention Completely
Note:
The specification must fully describe the invention to support any claims made, and any amendments must be described in the original application.

Lack of written description is an issue that generally arises with respect to the subject matter of a claim. If an applicant amends or attempts to amend the abstract, specification or drawings of an application, an issue of new matter will arise if the content of the amendment is not described in the application as filed. Stated another way, information contained in any one of the specification, claims or drawings of the application as filed may be added to any other part of the application without introducing new matter.

Jump to MPEP SourceSpecificationPatent Application Content

Citations

Primary topicCitation
Amendments Adding New Matter
Assignee as Applicant Signature
New Matter Objection Response
Prior Art in Reissue
Rejections Specific to Reissue
35 U.S.C. § 112
Amendments Adding New Matter
Assignee as Applicant Signature
New Matter Objection Response
Prior Art in Reissue
Rejections Specific to Reissue
35 U.S.C. § 112(a)
New Matter Objection Response
No New Matter in Reissue
Prior Art in Reissue
Rejections Specific to Reissue
Support in Original Patent
35 U.S.C. § 132
No New Matter in Reissue
Support in Original Patent
35 U.S.C. § 251
PTAB JurisdictionMPEP § 1201
Claim Subject MatterMPEP § 608.01(o)
Claim Subject MatterForm Paragraph § 7.44
Claim Subject MatterIn re Benno, 768 F.2d 1340, 226 USPQ 683 (Fed. Cir. 1985)
New Matter Objection Response
Prior Art in Reissue
Rejections Specific to Reissue
In re Rasmussen, 650 F.2d 1212, 211 USPQ 323 (CCPA 1981)

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