MPEP § 1204.04 — Official Record on Appeal (Annotated Rules)

§1204.04 Official Record on Appeal

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

This page consolidates and annotates all enforceable requirements under MPEP § 1204.04, 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.

Official Record on Appeal

This section addresses Official Record on Appeal. Primary authority: 37 CFR 41.30, 37 CFR 41.33(d)(2), and 37 CFR 41.39(a)(2). Contains: 3 permissions and 4 other statements.

Key Rules

Topic

New Ground of Rejection in Answer

4 rules
StatutoryPermittedAlways
[mpep-1204-04-f796b6fa9c66626ffa8bd027]
Permitted Dictionary Consultation During Appeal
Note:
This rule allows appellants and examiners to consult dictionaries during the appeal process without it being considered new evidence, aligning with Supreme Court and Federal Circuit precedent.

For the purposes of appeal, "Evidence" does not encompass dictionaries. Excluding dictionaries from the definition of "Evidence" thus allows appellants to refer to dictionaries in their briefs, which would otherwise be precluded under 37 CFR 41.33(d)(2) (absent existence of one of the enumerated exceptions). It further allows examiners to refer to dictionaries in the examiner’s answers without automatically rendering a rejection a new ground under 37 CFR 41.39(a)(2). Treating dictionaries in this manner is consistent with Supreme Court and Federal Circuit precedent, which contemplate that such materials may be consulted by tribunals "at any time." See, e.g., Nix v. Hedden, 149 U.S. 304, 307 (1893) (citations omitted) (admitting dictionaries to understand the ordinary meaning of terms "not as evidence, but only as aids to the memory and understanding of the court"); Phillips v. AWH Corp., 415 F.3d 1303, 1322–23, 75 USPQ2d 1321, 1333 (Fed. Cir. 2005) (en banc) ("[J]udges are free to consult dictionaries and technical treatises at any time in order to better understand the underlying technology and may also rely on dictionary definitions when construing claim terms, so long as the dictionary definition does not contradict any definition found in or ascertained by a reading of the patent documents.") (citation omitted); In re Boon, 439 F.2d 724, 727–28, 169 USPQ 231, 234 (CCPA 1971) (holding citation to dictionary was not tantamount to the assertion of a new ground of rejection "where such a reference is a standard work, cited only to support a fact judicially noticed and, as here, the fact so noticed plays a minor role, serving only to fill in the gaps which might exist in the evidentiary showing made by the Examiner to support a particular ground for rejection." (emphasis and internal quotations omitted)). Thus, 37 CFR 41.30 permits both the applicant and examiner to submit them to the Board during the briefing stage.

Jump to MPEP Source · 37 CFR 41.33(d)(2)New Ground of Rejection in AnswerAppeal to Federal CircuitExaminer's Answer
StatutoryPermittedAlways
[mpep-1204-04-47b58539bd5cd7065e2d1e73]
Judges May Use Dictionaries for Clarification
Note:
Judges are permitted to consult dictionaries and technical treatises at any time to better understand the underlying technology, provided that dictionary definitions do not contradict those found in or ascertained by reading the patent documents.

For the purposes of appeal, "Evidence" does not encompass dictionaries. Excluding dictionaries from the definition of "Evidence" thus allows appellants to refer to dictionaries in their briefs, which would otherwise be precluded under 37 CFR 41.33(d)(2) (absent existence of one of the enumerated exceptions). It further allows examiners to refer to dictionaries in the examiner’s answers without automatically rendering a rejection a new ground under 37 CFR 41.39(a)(2). Treating dictionaries in this manner is consistent with Supreme Court and Federal Circuit precedent, which contemplate that such materials may be consulted by tribunals "at any time." See, e.g., Nix v. Hedden, 149 U.S. 304, 307 (1893) (citations omitted) (admitting dictionaries to understand the ordinary meaning of terms "not as evidence, but only as aids to the memory and understanding of the court"); Phillips v. AWH Corp., 415 F.3d 1303, 1322–23, 75 USPQ2d 1321, 1333 (Fed. Cir. 2005) (en banc) ("[J]udges are free to consult dictionaries and technical treatises at any time in order to better understand the underlying technology and may also rely on dictionary definitions when construing claim terms, so long as the dictionary definition does not contradict any definition found in or ascertained by a reading of the patent documents.") (citation omitted); In re Boon, 439 F.2d 724, 727–28, 169 USPQ 231, 234 (CCPA 1971) (holding citation to dictionary was not tantamount to the assertion of a new ground of rejection "where such a reference is a standard work, cited only to support a fact judicially noticed and, as here, the fact so noticed plays a minor role, serving only to fill in the gaps which might exist in the evidentiary showing made by the Examiner to support a particular ground for rejection." (emphasis and internal quotations omitted)). Thus, 37 CFR 41.30 permits both the applicant and examiner to submit them to the Board during the briefing stage.

Jump to MPEP Source · 37 CFR 41.33(d)(2)New Ground of Rejection in AnswerAppeal to Federal CircuitExaminer's Answer
StatutoryInformativeAlways
[mpep-1204-04-9b543d18591ef996d93a5c1f]
Dictionaries Not Considered Evidence
Note:
For appeal purposes, dictionaries are not considered evidence and can be used by both appellants and examiners without constituting a new ground of rejection.

For the purposes of appeal, "Evidence" does not encompass dictionaries. Excluding dictionaries from the definition of "Evidence" thus allows appellants to refer to dictionaries in their briefs, which would otherwise be precluded under 37 CFR 41.33(d)(2) (absent existence of one of the enumerated exceptions). It further allows examiners to refer to dictionaries in the examiner’s answers without automatically rendering a rejection a new ground under 37 CFR 41.39(a)(2). Treating dictionaries in this manner is consistent with Supreme Court and Federal Circuit precedent, which contemplate that such materials may be consulted by tribunals "at any time." See, e.g., Nix v. Hedden, 149 U.S. 304, 307 (1893) (citations omitted) (admitting dictionaries to understand the ordinary meaning of terms "not as evidence, but only as aids to the memory and understanding of the court"); Phillips v. AWH Corp., 415 F.3d 1303, 1322–23, 75 USPQ2d 1321, 1333 (Fed. Cir. 2005) (en banc) ("[J]udges are free to consult dictionaries and technical treatises at any time in order to better understand the underlying technology and may also rely on dictionary definitions when construing claim terms, so long as the dictionary definition does not contradict any definition found in or ascertained by a reading of the patent documents.") (citation omitted); In re Boon, 439 F.2d 724, 727–28, 169 USPQ 231, 234 (CCPA 1971) (holding citation to dictionary was not tantamount to the assertion of a new ground of rejection "where such a reference is a standard work, cited only to support a fact judicially noticed and, as here, the fact so noticed plays a minor role, serving only to fill in the gaps which might exist in the evidentiary showing made by the Examiner to support a particular ground for rejection." (emphasis and internal quotations omitted)). Thus, 37 CFR 41.30 permits both the applicant and examiner to submit them to the Board during the briefing stage.

Jump to MPEP Source · 37 CFR 41.33(d)(2)New Ground of Rejection in AnswerAppeal to Federal CircuitExaminer's Answer
StatutoryInformativeAlways
[mpep-1204-04-8ededc527148f8ed4afc6518]
Citation of Dictionaries Not New Grounds
Note:
Citing dictionaries is allowed without constituting a new ground of rejection if the dictionary is a standard work and cited to support judicially noticed facts that play a minor role.

For the purposes of appeal, "Evidence" does not encompass dictionaries. Excluding dictionaries from the definition of "Evidence" thus allows appellants to refer to dictionaries in their briefs, which would otherwise be precluded under 37 CFR 41.33(d)(2) (absent existence of one of the enumerated exceptions). It further allows examiners to refer to dictionaries in the examiner’s answers without automatically rendering a rejection a new ground under 37 CFR 41.39(a)(2). Treating dictionaries in this manner is consistent with Supreme Court and Federal Circuit precedent, which contemplate that such materials may be consulted by tribunals "at any time." See, e.g., Nix v. Hedden, 149 U.S. 304, 307 (1893) (citations omitted) (admitting dictionaries to understand the ordinary meaning of terms "not as evidence, but only as aids to the memory and understanding of the court"); Phillips v. AWH Corp., 415 F.3d 1303, 1322–23, 75 USPQ2d 1321, 1333 (Fed. Cir. 2005) (en banc) ("[J]udges are free to consult dictionaries and technical treatises at any time in order to better understand the underlying technology and may also rely on dictionary definitions when construing claim terms, so long as the dictionary definition does not contradict any definition found in or ascertained by a reading of the patent documents.") (citation omitted); In re Boon, 439 F.2d 724, 727–28, 169 USPQ 231, 234 (CCPA 1971) (holding citation to dictionary was not tantamount to the assertion of a new ground of rejection "where such a reference is a standard work, cited only to support a fact judicially noticed and, as here, the fact so noticed plays a minor role, serving only to fill in the gaps which might exist in the evidentiary showing made by the Examiner to support a particular ground for rejection." (emphasis and internal quotations omitted)). Thus, 37 CFR 41.30 permits both the applicant and examiner to submit them to the Board during the briefing stage.

Jump to MPEP Source · 37 CFR 41.33(d)(2)New Ground of Rejection in AnswerAppeal to Federal CircuitExaminer's Answer
Topic

Testimony Request Procedures

1 rules
StatutoryPermittedAlways
[mpep-1204-04-efc2aba0c6e204d382816679]
Definition of Evidence Excluding Dictionaries
Note:
Defines evidence as items that prove or disprove alleged facts, excluding dictionaries which may still be cited before the Board.

Evidence means something (including testimony, documents and tangible objects) that tends to prove or disprove the existence of an alleged fact, except that for the purpose of this subpart Evidence does not include dictionaries, which may be cited before the Board.

Jump to MPEP Source · 37 CFR 41.30Testimony Request ProceduresPTAB JurisdictionUSPTO Employee Testimony
Topic

Ex Parte Appeals to PTAB

1 rules
StatutoryInformativeAlways
[mpep-1204-04-daa0054fb27f0cf288d3c078]
Dictionaries Not Considered Evidence on Appeal
Note:
For appeals, dictionaries are not considered evidence and can be used by both appellants and examiners as aids without constituting new grounds for rejection.

For the purposes of appeal, "Evidence" does not encompass dictionaries. Excluding dictionaries from the definition of "Evidence" thus allows appellants to refer to dictionaries in their briefs, which would otherwise be precluded under 37 CFR 41.33(d)(2) (absent existence of one of the enumerated exceptions). It further allows examiners to refer to dictionaries in the examiner’s answers without automatically rendering a rejection a new ground under 37 CFR 41.39(a)(2). Treating dictionaries in this manner is consistent with Supreme Court and Federal Circuit precedent, which contemplate that such materials may be consulted by tribunals "at any time." See, e.g., Nix v. Hedden, 149 U.S. 304, 307 (1893) (citations omitted) (admitting dictionaries to understand the ordinary meaning of terms "not as evidence, but only as aids to the memory and understanding of the court"); Phillips v. AWH Corp., 415 F.3d 1303, 1322–23, 75 USPQ2d 1321, 1333 (Fed. Cir. 2005) (en banc) ("[J]udges are free to consult dictionaries and technical treatises at any time in order to better understand the underlying technology and may also rely on dictionary definitions when construing claim terms, so long as the dictionary definition does not contradict any definition found in or ascertained by a reading of the patent documents.") (citation omitted); In re Boon, 439 F.2d 724, 727–28, 169 USPQ 231, 234 (CCPA 1971) (holding citation to dictionary was not tantamount to the assertion of a new ground of rejection "where such a reference is a standard work, cited only to support a fact judicially noticed and, as here, the fact so noticed plays a minor role, serving only to fill in the gaps which might exist in the evidentiary showing made by the Examiner to support a particular ground for rejection." (emphasis and internal quotations omitted)). Thus, 37 CFR 41.30 permits both the applicant and examiner to submit them to the Board during the briefing stage.

Jump to MPEP Source · 37 CFR 41.33(d)(2)Ex Parte Appeals to PTABNew Ground of Rejection in AnswerAppeal to Federal Circuit
Topic

Judicial Review of Board Decisions

1 rules
StatutoryInformativeAlways
[mpep-1204-04-10703f429061e3a9ee773152]
Dictionaries Not Considered Evidence
Note:
For appeals, dictionaries are not considered evidence and can be used by both appellants and examiners to understand terms without constituting new grounds for rejection.

For the purposes of appeal, "Evidence" does not encompass dictionaries. Excluding dictionaries from the definition of "Evidence" thus allows appellants to refer to dictionaries in their briefs, which would otherwise be precluded under 37 CFR 41.33(d)(2) (absent existence of one of the enumerated exceptions). It further allows examiners to refer to dictionaries in the examiner’s answers without automatically rendering a rejection a new ground under 37 CFR 41.39(a)(2). Treating dictionaries in this manner is consistent with Supreme Court and Federal Circuit precedent, which contemplate that such materials may be consulted by tribunals "at any time." See, e.g., Nix v. Hedden, 149 U.S. 304, 307 (1893) (citations omitted) (admitting dictionaries to understand the ordinary meaning of terms "not as evidence, but only as aids to the memory and understanding of the court"); Phillips v. AWH Corp., 415 F.3d 1303, 1322–23, 75 USPQ2d 1321, 1333 (Fed. Cir. 2005) (en banc) ("[J]udges are free to consult dictionaries and technical treatises at any time in order to better understand the underlying technology and may also rely on dictionary definitions when construing claim terms, so long as the dictionary definition does not contradict any definition found in or ascertained by a reading of the patent documents.") (citation omitted); In re Boon, 439 F.2d 724, 727–28, 169 USPQ 231, 234 (CCPA 1971) (holding citation to dictionary was not tantamount to the assertion of a new ground of rejection "where such a reference is a standard work, cited only to support a fact judicially noticed and, as here, the fact so noticed plays a minor role, serving only to fill in the gaps which might exist in the evidentiary showing made by the Examiner to support a particular ground for rejection." (emphasis and internal quotations omitted)). Thus, 37 CFR 41.30 permits both the applicant and examiner to submit them to the Board during the briefing stage.

Jump to MPEP Source · 37 CFR 41.33(d)(2)Judicial Review of Board DecisionsNew Ground of Rejection in AnswerAppeal to Federal Circuit
Topic

PTAB Jurisdiction

1 rules
StatutoryInformativeAlways
[mpep-1204-04-c0833f3221c53de587be541d]
Permitting Dictionary Use During Briefing
Note:
The rule allows both applicants and examiners to refer to dictionaries during the briefing stage without it being considered new evidence or grounds for rejection.

For the purposes of appeal, "Evidence" does not encompass dictionaries. Excluding dictionaries from the definition of "Evidence" thus allows appellants to refer to dictionaries in their briefs, which would otherwise be precluded under 37 CFR 41.33(d)(2) (absent existence of one of the enumerated exceptions). It further allows examiners to refer to dictionaries in the examiner’s answers without automatically rendering a rejection a new ground under 37 CFR 41.39(a)(2). Treating dictionaries in this manner is consistent with Supreme Court and Federal Circuit precedent, which contemplate that such materials may be consulted by tribunals "at any time." See, e.g., Nix v. Hedden, 149 U.S. 304, 307 (1893) (citations omitted) (admitting dictionaries to understand the ordinary meaning of terms "not as evidence, but only as aids to the memory and understanding of the court"); Phillips v. AWH Corp., 415 F.3d 1303, 1322–23, 75 USPQ2d 1321, 1333 (Fed. Cir. 2005) (en banc) ("[J]udges are free to consult dictionaries and technical treatises at any time in order to better understand the underlying technology and may also rely on dictionary definitions when construing claim terms, so long as the dictionary definition does not contradict any definition found in or ascertained by a reading of the patent documents.") (citation omitted); In re Boon, 439 F.2d 724, 727–28, 169 USPQ 231, 234 (CCPA 1971) (holding citation to dictionary was not tantamount to the assertion of a new ground of rejection "where such a reference is a standard work, cited only to support a fact judicially noticed and, as here, the fact so noticed plays a minor role, serving only to fill in the gaps which might exist in the evidentiary showing made by the Examiner to support a particular ground for rejection." (emphasis and internal quotations omitted)). Thus, 37 CFR 41.30 permits both the applicant and examiner to submit them to the Board during the briefing stage.

Jump to MPEP Source · 37 CFR 41.33(d)(2)PTAB JurisdictionEx Parte Appeals to PTABPTAB Contested Case Procedures

Citations

Primary topicCitation
Ex Parte Appeals to PTAB
Judicial Review of Board Decisions
New Ground of Rejection in Answer
PTAB Jurisdiction
37 CFR § 41.30
Ex Parte Appeals to PTAB
Judicial Review of Board Decisions
New Ground of Rejection in Answer
PTAB Jurisdiction
37 CFR § 41.33(d)(2)
Ex Parte Appeals to PTAB
Judicial Review of Board Decisions
New Ground of Rejection in Answer
PTAB Jurisdiction
37 CFR § 41.39(a)(2)
Ex Parte Appeals to PTAB
Judicial Review of Board Decisions
New Ground of Rejection in Answer
PTAB Jurisdiction
Nix v. Hedden, 149 U.S. 304, 307 (1893)

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