MPEP § 1205 — Appeal Brief (Annotated Rules)

§1205 Appeal Brief

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

This page consolidates and annotates all enforceable requirements under MPEP § 1205, 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.

Appeal Brief

This section addresses Appeal Brief. Primary authority: 37 CFR 41.31, 37 CFR 37, and 37 CFR 41.45. Contains: 3 requirements, 1 prohibition, and 4 other statements.

Key Rules

Topic

Ex Parte Appeals to PTAB

7 rules
StatutoryRequiredAlways
[mpep-1205-bc5cd3be002f27df4a6b18d1]
Argument Requirement for Appeal Brief
Note:
The appeal brief must include arguments addressing each ground of rejection, explaining why the examiner's decision is erroneous, and providing citations to statutes, regulations, authorities, and parts of the record relied upon.

(c) Content of appeal brief.
(1) Except as otherwise provided in this paragraph, the brief shall contain the following items under appropriate headings and in the order indicated in paragraphs (c)(1)(i) through (v) of this section, except that a brief filed by an appellant who is not represented by a registered practitioner need only substantially comply with paragraphs (c)(1)(i), (c)(1)(ii), (c)(1)(iv), and (c)(1)(v) of this section:

(iv) Argument.

Jump to MPEP Source · 37 CFR 41.37Ex Parte Appeals to PTABReply Brief FilingReply Brief and Forwarding
StatutoryRequiredAlways
[mpep-1205-b566421fc5ebfbfc2b4ce5ea]
Argument Requirements for Appeal Briefs
Note:
The appeal brief must include detailed arguments addressing each ground of rejection, supported by relevant statutes, regulations, authorities, and parts of the record.

(c) Content of appeal brief.
(1) Except as otherwise provided in this paragraph, the brief shall contain the following items under appropriate headings and in the order indicated in paragraphs (c)(1)(i) through (v) of this section, except that a brief filed by an appellant who is not represented by a registered practitioner need only substantially comply with paragraphs (c)(1)(i), (c)(1)(ii), (c)(1)(iv), and (c)(1)(v) of this section:

The arguments of appellant with respect to each ground of rejection, and the basis therefor, with citations of the statutes, regulations, authorities, and parts of the Record relied on.

Jump to MPEP Source · 37 CFR 41.37Ex Parte Appeals to PTABReply Brief FilingReply Brief and Forwarding
StatutoryRequiredAlways
[mpep-1205-27bb01f18eec8205665fdb3b]
Explain Examiner's Error for Each Rejection Ground
Note:
Appellants must provide arguments explaining why the examiner erred on each contested ground of rejection in their appeal brief.

(c) Content of appeal brief.
(1) Except as otherwise provided in this paragraph, the brief shall contain the following items under appropriate headings and in the order indicated in paragraphs (c)(1)(i) through (v) of this section, except that a brief filed by an appellant who is not represented by a registered practitioner need only substantially comply with paragraphs (c)(1)(i), (c)(1)(ii), (c)(1)(iv), and (c)(1)(v) of this section:

The arguments shall explain why the examiner erred as to each ground of rejection contested by appellant.

Jump to MPEP Source · 37 CFR 41.37Ex Parte Appeals to PTABReply Brief FilingReply Brief and Forwarding
StatutoryRequiredAlways
[mpep-1205-3b7af71b1c3c307add1ee153]
Separate Heading for Each Ground of Rejection
Note:
Each ground of rejection contested by the appellant must be argued under a separate heading that clearly identifies the specific claim number, statutory basis, and applied reference.

(c) Content of appeal brief.
(1) Except as otherwise provided in this paragraph, the brief shall contain the following items under appropriate headings and in the order indicated in paragraphs (c)(1)(i) through (v) of this section, except that a brief filed by an appellant who is not represented by a registered practitioner need only substantially comply with paragraphs (c)(1)(i), (c)(1)(ii), (c)(1)(iv), and (c)(1)(v) of this section:

Each ground of rejection contested by appellant must be argued under a separate heading, and each heading shall reasonably identify the ground of rejection being contested (e.g., by claim number, statutory basis, and applied reference, if any).

Jump to MPEP Source · 37 CFR 41.37Ex Parte Appeals to PTABReply Brief FilingReply Brief and Forwarding
StatutoryPermittedAlways
[mpep-1205-b836ac24d132e860e9854f7c]
Claims May Be Argued Separately, As A Group, Or Subgroup
Note:
Appellants can argue claims separately if considered patentable individually, as a group where all claims stand or fall together under the same ground of rejection, or as a subgroup within that group.

(c) Content of appeal brief.
(1) Except as otherwise provided in this paragraph, the brief shall contain the following items under appropriate headings and in the order indicated in paragraphs (c)(1)(i) through (v) of this section, except that a brief filed by an appellant who is not represented by a registered practitioner need only substantially comply with paragraphs (c)(1)(i), (c)(1)(ii), (c)(1)(iv), and (c)(1)(v) of this section:

For each ground of rejection applying to two or more claims, the claims may be argued separately (claims are considered by appellant as separately patentable), as a group (all claims subject to the ground of rejection stand or fall together), or as a subgroup (a subset of the claims subject to the ground of rejection stand or fall together).

Jump to MPEP Source · 37 CFR 41.37Ex Parte Appeals to PTABReply Brief FilingReply Brief and Forwarding
StatutoryRequiredAlways
[mpep-1205-608ae0269e558d9f4d90a5fd]
Separate Subheadings for Claim Arguments
Note:
When arguing claims under a ground of rejection in an appeal brief, each claim or subgroup must be argued under a separate subheading that identifies the specific claim numbers.

(c) Content of appeal brief.
(1) Except as otherwise provided in this paragraph, the brief shall contain the following items under appropriate headings and in the order indicated in paragraphs (c)(1)(i) through (v) of this section, except that a brief filed by an appellant who is not represented by a registered practitioner need only substantially comply with paragraphs (c)(1)(i), (c)(1)(ii), (c)(1)(iv), and (c)(1)(v) of this section:

Under each heading identifying the ground of rejection being contested, any claim(s) argued separately or as a subgroup shall be argued under a separate subheading that identifies the claim(s) by number.

Jump to MPEP Source · 37 CFR 41.37Ex Parte Appeals to PTABReply Brief FilingReply Brief and Forwarding
StatutoryRequiredAlways
[mpep-1205-b03eba699fb602efea6dccab]
Claims Must Be Argued for Patentability
Note:
In an appeal brief, claims must be argued with reasoning and citations to support their patentability; merely stating what a claim recites is insufficient.

(c) Content of appeal brief.
(1) Except as otherwise provided in this paragraph, the brief shall contain the following items under appropriate headings and in the order indicated in paragraphs (c)(1)(i) through (v) of this section, except that a brief filed by an appellant who is not represented by a registered practitioner need only substantially comply with paragraphs (c)(1)(i), (c)(1)(ii), (c)(1)(iv), and (c)(1)(v) of this section:

A statement which merely points out what a claim recites will not be considered an argument for separate patentability of the claim.

Jump to MPEP Source · 37 CFR 41.37Ex Parte Appeals to PTABReply Brief FilingReply Brief and Forwarding
Topic

Appeal Brief Requirements

5 rules
StatutoryInformativeAlways
[mpep-1205-7c3d7fdc51f1a4923079bd91]
Filing Appeal Brief Within Two Months
Note:
An appellant must file an appeal brief within two months of filing the notice of appeal, and if an examiner's answer results, the forwarding fee must be paid to avoid dismissal.

(a) Timing. Appellant must file a brief under this section within two months from the date of filing the notice of appeal under § 41.31. The appeal brief fee in an application or ex parte reexamination proceeding is $0.00, but if the appeal results in an examiner's answer, the appeal forwarding fee set forth in § 37 CFR 41.20(b)(4) must be paid within the time period specified in § 41.45 to avoid dismissal of an appeal.

Jump to MPEP Source · 37 CFR 41.31Appeal Brief RequirementsEx Parte Appeals to PTABAppeal Brief Timing
StatutoryRequiredAlways
[mpep-1205-4baf17c585204c601450c632]
Content Requirements for Appeal Briefs
Note:
The rule outlines the necessary content and structure of appeal briefs, including identification of real parties in interest, related cases, summary of claimed subject matter, arguments, and claims appendix.
(c) Content of appeal brief.
  • (1) Except as otherwise provided in this paragraph, the brief shall contain the following items under appropriate headings and in the order indicated in paragraphs (c)(1)(i) through (v) of this section, except that a brief filed by an appellant who is not represented by a registered practitioner need only substantially comply with paragraphs (c)(1)(i), (c)(1)(ii), (c)(1)(iv), and (c)(1)(v) of this section:
    • (i) Real party in interest. A statement identifying by name the real party in interest at the time the appeal brief is filed, except that such statement is not required if the named inventor or inventors are themselves the real party in interest. If an appeal brief does not contain a statement of the real party in interest, the Office may assume that the named inventor or inventors are the real party in interest.
    • (ii) Related appeals, interferences, and trials. A statement identifying by application, patent, appeal, interference, or trial number all other prior and pending appeals, interferences, trials before the Board, or judicial proceedings (collectively, "related cases") which satisfy all of the following conditions: involve an application or patent owned by the appellant or assignee, are known to appellant, the appellant’s legal representative, or assignee, and may be related to, directly affect or be directly affected by or have a bearing on the Board’s decision in the pending appeal, except that such statement is not required if there are no such related cases. If an appeal brief does not contain a statement of related cases, the Office may assume that there are no such related cases.
    • (iii) Summary of claimed subject matter. A concise explanation of the subject matter defined in each of the rejected independent claims, which shall refer to the specification in the Record by page and line number or by paragraph number, and to the drawing, if any, by reference characters. For each rejected independent claim, and for each dependent claim argued separately under the provisions of paragraph (c)(1)(iv) of this section, if the claim contains a means plus function or step plus function recitation as permitted by 35 U.S.C. 112(f), then the concise explanation must identify the structure, material, or acts described in the specification in the Record as corresponding to each claimed function with reference to the specification in the Record by page and line number or by paragraph number, and to the drawing, if any, by reference characters. Reference to the patent application publication does not satisfy the requirements of this paragraph.
    • (iv) Argument. The arguments of appellant with respect to each ground of rejection, and the basis therefor, with citations of the statutes, regulations, authorities, and parts of the Record relied on. The arguments shall explain why the examiner erred as to each ground of rejection contested by appellant. Except as provided for in §§ 41.41, 41.47 and 41.52, any arguments or authorities not included in the appeal brief will be refused consideration by the Board for purposes of the present appeal. Each ground of rejection contested by appellant must be argued under a separate heading, and each heading shall reasonably identify the ground of rejection being contested (e.g., by claim number, statutory basis, and applied reference, if any). For each ground of rejection applying to two or more claims, the claims may be argued separately (claims are considered by appellant as separately patentable), as a group (all claims subject to the ground of rejection stand or fall together), or as a subgroup (a subset of the claims subject to the ground of rejection stand or fall together). When multiple claims subject to the same ground of rejection are argued as a group or subgroup by appellant, the Board may select a single claim from the group or subgroup and may decide the appeal as to the ground of rejection with respect to the group or subgroup on the basis of the selected claim alone. Notwithstanding any other provision of this paragraph, the failure of appellant to separately argue claims which appellant has grouped together shall constitute a waiver of any argument that the Board must consider the patentability of any grouped claim separately. Under each heading identifying the ground of rejection being contested, any claim(s) argued separately or as a subgroup shall be argued under a separate subheading that identifies the claim(s) by number. A statement which merely points out what a claim recites will not be considered an argument for separate patentability of the claim.
    • (v) Claims appendix. An appendix containing a copy of the claims involved in the appeal.
  • (2) A brief shall not include any new or non-admitted amendment, or any new or non-admitted affidavit or other Evidence. See § 37 CFR 1.116 of this title for treatment of amendments, affidavits or other evidence filed after final action but before or on the same date of filing an appeal and § 41.33 for treatment of amendments, affidavits or other Evidence filed after the date of filing the appeal. Review of an examiner's refusal to admit an amendment or Evidence is by petition to the Director. See § 1.181 of this title.
Jump to MPEP Source · 37 CFR 41.37Appeal Brief RequirementsEx Parte Appeals to PTABClaims Appendix Requirement
StatutoryProhibitedAlways
[mpep-1205-645bb596e5e342f663b92de0]
No New Evidence In Appeal Brief
Note:
An appeal brief must not include any new or non-admitted amendments, affidavits, or other evidence. Such materials should be addressed according to specific sections for filing after final action.

(c) Content of appeal brief.

(2) A brief shall not include any new or non-admitted amendment, or any new or non-admitted affidavit or other Evidence. See § 37 CFR 1.116 of this title for treatment of amendments, affidavits or other evidence filed after final action but before or on the same date of filing an appeal and § 41.33 for treatment of amendments, affidavits or other Evidence filed after the date of filing the appeal.

Jump to MPEP Source · 37 CFR 41.37Appeal Brief RequirementsEx Parte Appeals to PTABDirector Authority and Petitions (MPEP 1000)
StatutoryInformativeAlways
[mpep-1205-d87ca3e223eb67687d80b620]
Notice for Brief Non-Compliance and Amended Filing Requirement
Note:
If an appeal brief does not meet all requirements, the appellant is notified of non-compliance reasons and given time to amend. Failure to comply within this period results in dismissal.

(d) Notice of non-compliance. If a brief is filed which does not comply with all the requirements of paragraph (c) of this section, appellant will be notified of the reasons for non-compliance and given a time period within which to file an amended brief. If appellant does not, within the set time period, file an amended brief that overcomes all the reasons for non-compliance stated in the notification, the appeal will stand dismissed. Review of a determination of non-compliance is by petition to the Chief Administrative Patent Judge. See § 41.3.

Jump to MPEP Source · 37 CFR 41.3Appeal Brief RequirementsEx Parte Appeals to PTABNon-Compliant Appeal Brief
StatutoryInformativeAlways
[mpep-1205-55a33ee97e565035fdf77da3]
Petition to Chief Judge for Non-Compliance Review
Note:
A determination of non-compliance with appeal brief requirements can be reviewed through a petition submitted to the Chief Administrative Patent Judge.

(d) Notice of non-compliance. If a brief is filed which does not comply with all the requirements of paragraph (c) of this section, appellant will be notified of the reasons for non-compliance and given a time period within which to file an amended brief. If appellant does not, within the set time period, file an amended brief that overcomes all the reasons for non-compliance stated in the notification, the appeal will stand dismissed. Review of a determination of non-compliance is by petition to the Chief Administrative Patent Judge. See § 41.3.

Jump to MPEP Source · 37 CFR 41.3Appeal Brief RequirementsEx Parte Appeals to PTABNon-Compliant Appeal Brief
Topic

PTAB Jurisdiction

2 rules
StatutoryPermittedAlways
[mpep-1205-e8f5c87fc5e138c0e9ae7ca5]
Board Can Decide on Single Claim for Grouped Rejections
Note:
The Board may choose one claim from a group of claims subject to the same ground of rejection and base its decision on that single claim alone.

(c) Content of appeal brief.
(1) Except as otherwise provided in this paragraph, the brief shall contain the following items under appropriate headings and in the order indicated in paragraphs (c)(1)(i) through (v) of this section, except that a brief filed by an appellant who is not represented by a registered practitioner need only substantially comply with paragraphs (c)(1)(i), (c)(1)(ii), (c)(1)(iv), and (c)(1)(v) of this section:

When multiple claims subject to the same ground of rejection are argued as a group or subgroup by appellant, the Board may select a single claim from the group or subgroup and may decide the appeal as to the ground of rejection with respect to the group or subgroup on the basis of the selected claim alone.

Jump to MPEP Source · 37 CFR 41.37PTAB JurisdictionEx Parte Appeals to PTABPTAB Contested Case Procedures
StatutoryRequiredAlways
[mpep-1205-4aa4be160af23fad72ad29f2]
Waiver for Separate Claim Argumentation
Note:
Failing to separately argue grouped claims in an appeal brief waives the right to have those claims considered separately by the Board.

(c) Content of appeal brief.
(1) Except as otherwise provided in this paragraph, the brief shall contain the following items under appropriate headings and in the order indicated in paragraphs (c)(1)(i) through (v) of this section, except that a brief filed by an appellant who is not represented by a registered practitioner need only substantially comply with paragraphs (c)(1)(i), (c)(1)(ii), (c)(1)(iv), and (c)(1)(v) of this section:

Notwithstanding any other provision of this paragraph, the failure of appellant to separately argue claims which appellant has grouped together shall constitute a waiver of any argument that the Board must consider the patentability of any grouped claim separately.

Jump to MPEP Source · 37 CFR 41.37PTAB JurisdictionSIR Patent Rights WaiverEx Parte Appeals to PTAB
Topic

Non-Compliant Appeal Brief

2 rules
StatutoryInformativeAlways
[mpep-1205-a22f94a38180b458dfa84d2f]
Notice for Non-Compliance with Brief Requirements
Note:
If an appeal brief does not meet all the specified requirements, the appellant is notified and given time to amend it. Failure to do so within the period can result in dismissal of the appeal.

(d) Notice of non-compliance. If a brief is filed which does not comply with all the requirements of paragraph (c) of this section, appellant will be notified of the reasons for non-compliance and given a time period within which to file an amended brief. If appellant does not, within the set time period, file an amended brief that overcomes all the reasons for non-compliance stated in the notification, the appeal will stand dismissed. Review of a determination of non-compliance is by petition to the Chief Administrative Patent Judge. See § 41.3.

Jump to MPEP Source · 37 CFR 41.3Non-Compliant Appeal BriefAppeal Brief RequirementsEx Parte Appeals to PTAB
StatutoryInformativeAlways
[mpep-1205-68f1889fb991e60cd6575232]
Amended Brief Required for Compliance
Note:
An appellant must file an amended brief that addresses all non-compliance issues within the specified time period, otherwise the appeal will be dismissed.

(d) Notice of non-compliance. If a brief is filed which does not comply with all the requirements of paragraph (c) of this section, appellant will be notified of the reasons for non-compliance and given a time period within which to file an amended brief. If appellant does not, within the set time period, file an amended brief that overcomes all the reasons for non-compliance stated in the notification, the appeal will stand dismissed. Review of a determination of non-compliance is by petition to the Chief Administrative Patent Judge. See § 41.3.

Jump to MPEP Source · 37 CFR 41.3Non-Compliant Appeal BriefAppeal Brief RequirementsEx Parte Appeals to PTAB
Topic

Appeal Brief Timing

1 rules
StatutoryRequiredAlways
[mpep-1205-6ce55123154a632bd0c498fb]
Appellant Must File Appeal Brief Within Two Months
Note:
An appellant is required to file an appeal brief within two months of filing the notice of appeal, unless the appeal results in an examiner's answer, in which case additional fees must be paid.

(a) Timing. Appellant must file a brief under this section within two months from the date of filing the notice of appeal under § 41.31. The appeal brief fee in an application or ex parte reexamination proceeding is $0.00, but if the appeal results in an examiner's answer, the appeal forwarding fee set forth in § 37 CFR 41.20(b)(4) must be paid within the time period specified in § 41.45 to avoid dismissal of an appeal.

Jump to MPEP Source · 37 CFR 41.31Appeal Brief TimingNotice of Appeal FilingAppeal Brief Requirements
Topic

Grounds for Dismissal of Appeal

1 rules
StatutoryRequiredAlways
[mpep-1205-29645b967abb50c8443c67c5]
Forwarding Fee Requirement After Examiner's Answer
Note:
An appeal forwarding fee must be paid if an examiner's answer is issued, to avoid dismissal of the appeal.

(a) Timing. Appellant must file a brief under this section within two months from the date of filing the notice of appeal under § 41.31. The appeal brief fee in an application or ex parte reexamination proceeding is $0.00, but if the appeal results in an examiner's answer, the appeal forwarding fee set forth in § 37 CFR 41.20(b)(4) must be paid within the time period specified in § 41.45 to avoid dismissal of an appeal.

Jump to MPEP Source · 37 CFR 41.31Grounds for Dismissal of AppealAppeal Brief RequirementsAppeal Withdrawal and Dismissal
Topic

Reply Brief Filing

1 rules
StatutoryRequiredAlways
[mpep-1205-1ec35bc15c30d88b2a903045]
Inclusion of Arguments and Authorities Required
Note:
The appeal brief must include all arguments and authorities for the present appeal; otherwise, they will be disregarded by the Board.

(c) Content of appeal brief.
(1) Except as otherwise provided in this paragraph, the brief shall contain the following items under appropriate headings and in the order indicated in paragraphs (c)(1)(i) through (v) of this section, except that a brief filed by an appellant who is not represented by a registered practitioner need only substantially comply with paragraphs (c)(1)(i), (c)(1)(ii), (c)(1)(iv), and (c)(1)(v) of this section:

Except as provided for in §§ 41.41, 41.47 and 41.52, any arguments or authorities not included in the appeal brief will be refused consideration by the Board for purposes of the present appeal.

Jump to MPEP Source · 37 CFR 41.37Reply Brief FilingReply Brief and ForwardingPTAB Jurisdiction
Topic

Director Authority and Petitions (MPEP 1000)

1 rules
StatutoryRequiredAlways
[mpep-1205-d08ef6dc7ac344f036863086]
Petition Required for Examiner's Refusal of Amendment
Note:
A petition to the Director is required if an examiner refuses to admit an amendment or evidence during the appeal process.

(c) Content of appeal brief.

Review of an examiner's refusal to admit an amendment or Evidence is by petition to the Director. See § 1.181 of this title.

Jump to MPEP Source · 37 CFR 41.37Director Authority and Petitions (MPEP 1000)Appeal Brief RequirementsEx Parte Appeals to PTAB
Topic

Appeals in Reexamination

1 rules
StatutoryInformativeAlways
[mpep-1205-0c342fec588cfc482beb79cb]
Extensions for Time Periods
Note:
The time periods specified in this section can be extended according to the provisions of § 1.136 for patent applications and § 1.550(c) for ex parte reexamination proceedings.

(e) Extensions of time. The time periods set forth in this section are extendable under the provisions of § 1.136 of this title for patent applications and § 1.550(c) of this title for ex parte reexamination proceedings.

Jump to MPEP Source · 37 CFR 1.136Appeals in ReexaminationEx Parte ReexaminationAppeal Brief Requirements
Topic

Ex Parte Reexamination

1 rules
StatutoryInformativeAlways
[mpep-1205-20372ec4f5ef59c7a5b881a0]
Extensions for Time Periods
Note:
This rule allows extensions of time periods for patent applications and ex parte reexamination proceedings as specified in the relevant sections.

(e) Extensions of time. The time periods set forth in this section are extendable under the provisions of § 1.136 of this title for patent applications and § 1.550(c) of this title for ex parte reexamination proceedings.

Jump to MPEP Source · 37 CFR 1.136Ex Parte ReexaminationAppeals in ReexaminationAppeal Brief Requirements

Citations

Primary topicCitation
Appeal Brief Requirements35 U.S.C. § 112(f)
Appeal Brief Requirements
Director Authority and Petitions (MPEP 1000)
37 CFR § 1.116
Appeals in Reexamination
Ex Parte Reexamination
37 CFR § 1.136
Appeal Brief Requirements
Director Authority and Petitions (MPEP 1000)
37 CFR § 1.181
Appeals in Reexamination
Ex Parte Reexamination
37 CFR § 1.550(c)
Appeal Brief Requirements
Appeal Brief Timing
Grounds for Dismissal of Appeal
37 CFR § 41.20(b)(4)
Appeal Brief Requirements
Non-Compliant Appeal Brief
37 CFR § 41.3
Appeal Brief Requirements
Appeal Brief Timing
Grounds for Dismissal of Appeal
37 CFR § 41.31
Appeal Brief Requirements
Director Authority and Petitions (MPEP 1000)
37 CFR § 41.33
Appeal Brief Requirements
Ex Parte Appeals to PTAB
PTAB Jurisdiction
Reply Brief Filing
37 CFR § 41.41
Appeal Brief Requirements
Appeal Brief Timing
Grounds for Dismissal of Appeal
37 CFR § 41.45

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