MPEP § 2155 — Use of Affidavits or Declarations Under 37 CFR 1.130 To Overcome Prior Art Rejections (Annotated Rules)

§2155 Use of Affidavits or Declarations Under 37 CFR 1.130 To Overcome Prior Art Rejections

USPTO MPEP version: BlueIron's Update: 2026-01-10

This page consolidates and annotates all enforceable requirements under MPEP § 2155, 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.

Use of Affidavits or Declarations Under 37 CFR 1.130 To Overcome Prior Art Rejections

This section addresses Use of Affidavits or Declarations Under 37 CFR 1.130 To Overcome Prior Art Rejections. Primary authority: 35 U.S.C. 100, 35 U.S.C. 102, and 35 U.S.C. 102(a). Contains: 3 requirements, 1 permission, and 4 other statements.

Key Rules

Topic

AIA vs Pre-AIA Practice

3 rules
StatutoryInformativeAlways
[mpep-2155-c9b437a91d132747c9af70ed]
Requirement for Disqualifying Prior Art
Note:
Applicant must submit an affidavit to disqualify a disclosure as prior art if it was made by the inventor or obtained from them.

(a) Affidavit or declaration of attribution. When any claim of an application or a patent under reexamination is rejected, the applicant or patent owner may submit an appropriate affidavit or declaration to disqualify a disclosure as prior art by establishing that the disclosure was made by the inventor or a joint inventor, or the subject matter disclosed was obtained directly or indirectly from the inventor or a joint inventor.

Jump to MPEP Source · 37 CFR 1.130AIA vs Pre-AIA PracticeAssignee as Applicant SignatureApplicant and Assignee Filing Under AIA
StatutoryRequiredAlways
[mpep-2155-9665785808be02a030e56b14]
Affidavit Must Include Printed Publication If Publicly Disclosed
Note:
When an affidavit or declaration is submitted to establish prior public disclosure of a claim, if the subject matter was publicly disclosed in a printed publication on the specified date, the affidavit must be accompanied by a copy of that publication.

(b) Affidavit or declaration of prior public disclosure. When any claim of an application or a patent under reexamination is rejected, the applicant or patent owner may submit an appropriate affidavit or declaration to disqualify a disclosure as prior art by establishing that the subject matter disclosed had, before such disclosure was made or before such subject matter was effectively filed, been publicly disclosed by the inventor or a joint inventor or another who obtained the subject matter disclosed directly or indirectly from the inventor or a joint inventor. An affidavit or declaration under this paragraph must identify the subject matter publicly disclosed and provide the date such subject matter was publicly disclosed by the inventor or a joint inventor or another who obtained the subject matter disclosed directly or indirectly from the inventor or a joint inventor. (1) If the subject matter publicly disclosed on that date was in a printed publication, the affidavit or declaration must be accompanied by a copy of the printed publication.

Jump to MPEP Source · 37 CFR 1.130AIA vs Pre-AIA PracticeAssignee as Applicant SignatureApplicant and Assignee Filing Under AIA
StatutoryRequiredAlways
[mpep-2155-3fd9a8348eac074c553b43c0]
Affidavit Must Describe Public Disclosure
Note:
An affidavit must provide sufficient detail to describe publicly disclosed subject matter if it was not in a printed publication.

(b) Affidavit or declaration of prior public disclosure. When any claim of an application or a patent under reexamination is rejected, the applicant or patent owner may submit an appropriate affidavit or declaration to disqualify a disclosure as prior art by establishing that the subject matter disclosed had, before such disclosure was made or before such subject matter was effectively filed, been publicly disclosed by the inventor or a joint inventor or another who obtained the subject matter disclosed directly or indirectly from the inventor or a joint inventor. An affidavit or declaration under this paragraph must identify the subject matter publicly disclosed and provide the date such subject matter was publicly disclosed by the inventor or a joint inventor or another who obtained the subject matter disclosed directly or indirectly from the inventor or a joint inventor.

(2) If the subject matter publicly disclosed on that date was not in a printed publication, the affidavit or declaration must describe the subject matter with sufficient detail and particularity to determine what subject matter had been publicly disclosed on that date by the inventor or a joint inventor or another who obtained the subject matter disclosed directly or indirectly from the inventor or a joint inventor.

Jump to MPEP Source · 37 CFR 1.130AIA vs Pre-AIA PracticeAssignee as Applicant SignatureApplicant and Assignee Filing Under AIA
Topic

Assignee as Applicant Signature

2 rules
StatutoryPermittedAlways
[mpep-2155-78e135a492193e21e63278fa]
Requirement to Disqualify Prior Art by Affidavit
Note:
When a claim is rejected, the applicant can submit an affidavit to disqualify prior art if it was disclosed by or obtained from the inventor.

(a) Affidavit or declaration of attribution. When any claim of an application or a patent under reexamination is rejected, the applicant or patent owner may submit an appropriate affidavit or declaration to disqualify a disclosure as prior art by establishing that the disclosure was made by the inventor or a joint inventor, or the subject matter disclosed was obtained directly or indirectly from the inventor or a joint inventor.

Jump to MPEP Source · 37 CFR 1.130Assignee as Applicant SignatureApplicant and Assignee Filing Under AIAAIA vs Pre-AIA Practice
StatutoryRequiredAlways
[mpep-2155-03c011e3f6b8eda39b0a43ba]
Requirement for Affidavit of Prior Public Disclosure
Note:
An applicant must submit an affidavit to disqualify a disclosure as prior art if the subject matter was publicly disclosed by the inventor or another who obtained it from them before the effective filing date.
(b) Affidavit or declaration of prior public disclosure. When any claim of an application or a patent under reexamination is rejected, the applicant or patent owner may submit an appropriate affidavit or declaration to disqualify a disclosure as prior art by establishing that the subject matter disclosed had, before such disclosure was made or before such subject matter was effectively filed, been publicly disclosed by the inventor or a joint inventor or another who obtained the subject matter disclosed directly or indirectly from the inventor or a joint inventor. An affidavit or declaration under this paragraph must identify the subject matter publicly disclosed and provide the date such subject matter was publicly disclosed by the inventor or a joint inventor or another who obtained the subject matter disclosed directly or indirectly from the inventor or a joint inventor.
  • (1) If the subject matter publicly disclosed on that date was in a printed publication, the affidavit or declaration must be accompanied by a copy of the printed publication.
  • (2) If the subject matter publicly disclosed on that date was not in a printed publication, the affidavit or declaration must describe the subject matter with sufficient detail and particularity to determine what subject matter had been publicly disclosed on that date by the inventor or a joint inventor or another who obtained the subject matter disclosed directly or indirectly from the inventor or a joint inventor.
Jump to MPEP Source · 37 CFR 1.130Assignee as Applicant SignatureApplicant and Assignee Filing Under AIAAIA vs Pre-AIA Practice
Topic

AIA Overview and Effective Dates

2 rules
StatutoryInformativeAlways
[mpep-2155-6b3677f1ae9ee4b319f5df52]
Petition for Derivation Proceeding When Invention Same as Another’s
Note:
An applicant may petition for a derivation proceeding if the rejection is based on a U.S. patent or publication naming another inventor and the affidavit contends the claimed invention was derived from that inventor.

(c) When this section is not available. The provisions of this section are not available if the rejection is based upon a disclosure made more than one year before the effective filing date of the claimed invention. The provisions of this section may not be available if the rejection is based upon a U.S. patent or U.S. patent application publication of a patented or pending application naming another inventor, the patent or pending application claims an invention that is the same or substantially the same as the applicant's or patent owner's claimed invention, and the affidavit or declaration contends that an inventor named in the U.S. patent or U.S. patent application publication derived the claimed invention from the inventor or a joint inventor named in the application or patent, in which case an applicant or a patent owner may file a petition for a derivation proceeding pursuant to § 42.401 et seq. of this title.

Jump to MPEP Source · 37 CFR 42.401AIA Overview and Effective DatesAIA vs Pre-AIA PracticeKey Changes Under AIA
StatutoryInformativeAlways
[mpep-2155-e5f1bad55fe75bc09598baac]
Claims Must Have Effective Filing Date After March 16, 2013
Note:
The rule requires that any patent application and its claims must have an effective filing date on or after March 16, 2013.
(d) Applications and patents to which this section is applicable. The provisions of this section apply to any application for patent, and to any patent issuing thereon, that contains, or contained at any time:
  • (1) A claim to a claimed invention that has an effective filing date as defined in § 1.109 that is on or after March 16, 2013; or
  • (2) A specific reference under 35 U.S.C. 120, 121, 365(c), or 386(c) to any patent or application that contains, or contained at any time, a claim to a claimed invention that has an effective filing date as defined in § 1.109 that is on or after March 16, 2013.
Jump to MPEP Source · 37 CFR 1.130AIA Overview and Effective DatesAIA vs Pre-AIA PracticeAIA Effective Dates
Topic

Statutory Authority for Examination

1 rules
StatutoryInformativeAlways
[mpep-2155-051a0854905c983c10c8ee1b]
First Inventor to File Provision
Note:
This rule applies to applications subject to examination under the first inventor to file provisions of the AIA, as set forth in 35 U.S.C. 100 (note).

[Editor Note: This MPEP section is only applicable to applications subject to examination under the first inventor to file (FITF) provisions of the AIA as set forth in 35 U.S.C. 100 (note). See MPEP § 2159 et seq. to determine whether an application is subject to examination under the FITF provisions, and MPEP § 2131MPEP § 2138 for examination of applications subject to pre-AIA 35 U.S.C. 102.]

Jump to MPEP SourceStatutory Authority for ExaminationExamination ProceduresFirst Inventor to File (FITF) System
Topic

Determining Whether Application Is AIA or Pre-AIA

1 rules
StatutoryInformativeAlways
[mpep-2155-2ea4e06cfc040d6414831fd0]
Disclosure Must Be Recent for Prior Art Rejection
Note:
A rejection based on a disclosure older than one year before the effective filing date cannot use section provisions.

(c) When this section is not available. The provisions of this section are not available if the rejection is based upon a disclosure made more than one year before the effective filing date of the claimed invention. The provisions of this section may not be available if the rejection is based upon a U.S. patent or U.S. patent application publication of a patented or pending application naming another inventor, the patent or pending application claims an invention that is the same or substantially the same as the applicant's or patent owner's claimed invention, and the affidavit or declaration contends that an inventor named in the U.S. patent or U.S. patent application publication derived the claimed invention from the inventor or a joint inventor named in the application or patent, in which case an applicant or a patent owner may file a petition for a derivation proceeding pursuant to § 42.401 et seq. of this title.

Jump to MPEP Source · 37 CFR 42.401Determining Whether Application Is AIA or Pre-AIAPetition TimingDetermining AIA vs Pre-AIA Applicability (MPEP 2159)
Topic

Key Changes Under AIA

1 rules
StatutoryProhibitedAlways
[mpep-2155-fad0819f93f45dc39095ef28]
Petition for Derivation Proceeding When Invention Derived from Another Inventor
Note:
An applicant or patent owner may file a petition for a derivation proceeding if the claimed invention is derived from an inventor named in a U.S. patent or pending application publication.

(c) When this section is not available. The provisions of this section are not available if the rejection is based upon a disclosure made more than one year before the effective filing date of the claimed invention. The provisions of this section may not be available if the rejection is based upon a U.S. patent or U.S. patent application publication of a patented or pending application naming another inventor, the patent or pending application claims an invention that is the same or substantially the same as the applicant's or patent owner's claimed invention, and the affidavit or declaration contends that an inventor named in the U.S. patent or U.S. patent application publication derived the claimed invention from the inventor or a joint inventor named in the application or patent, in which case an applicant or a patent owner may file a petition for a derivation proceeding pursuant to § 42.401 et seq. of this title.

Jump to MPEP Source · 37 CFR 42.401Key Changes Under AIADetermining Whether Application Is AIA or Pre-AIAAssignee as Applicant Signature
Topic

AIA Grace Period Exceptions (MPEP 2153)

1 rules
StatutoryInformativeAlways
[mpep-2155-0b99196a7a5937b6c890af99]
Affidavit or Declaration for AIA Prior Art Exceptions
Note:
Submit an affidavit or declaration to establish that a disclosure is not prior art under AIA 35 U.S.C. 102(a) due to exceptions in AIA 35 U.S.C. 102(b).

The Office has provided a mechanism in 37 CFR 1.130 for filing an affidavit or declaration to establish that a disclosure is not prior art under AIA 35 U.S.C. 102(a) due to an exception in AIA 35 U.S.C. 102(b). Under 37 CFR 1.130(a), an affidavit or declaration of attribution may be submitted to except a disclosure as prior art because it was made by the inventor or a joint inventor, or the subject matter disclosed was obtained directly or indirectly from the inventor or a joint inventor. Under 37 CFR 1.130(b), an affidavit or declaration of prior public disclosure may be submitted to except an intervening disclosure as prior art if the subject matter disclosed had, before such disclosure was made or before such subject matter was effectively filed in a U.S. patent, U.S. patent application publication, or WIPO published application, been publicly disclosed by the inventor or a joint inventor or another who obtained the subject matter disclosed directly or indirectly from the inventor or a joint inventor.

Jump to MPEP Source · 37 CFR 1.130AIA Grace Period Exceptions (MPEP 2153)1.130 Affidavit or Declaration (MPEP 2155)Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)
Topic

Grace Period – Intervening Disclosure (102(b)(1)(B))

1 rules
StatutoryPermittedAlways
[mpep-2155-f8eb99b809fc49dc9c298f69]
Exceptions to Prior Art Due to Intervening Disclosure
Note:
An affidavit or declaration can exclude a disclosure as prior art if it was made by the inventor, joint inventor, or obtained from them.

The Office has provided a mechanism in 37 CFR 1.130 for filing an affidavit or declaration to establish that a disclosure is not prior art under AIA 35 U.S.C. 102(a) due to an exception in AIA 35 U.S.C. 102(b). Under 37 CFR 1.130(a), an affidavit or declaration of attribution may be submitted to except a disclosure as prior art because it was made by the inventor or a joint inventor, or the subject matter disclosed was obtained directly or indirectly from the inventor or a joint inventor. Under 37 CFR 1.130(b), an affidavit or declaration of prior public disclosure may be submitted to except an intervening disclosure as prior art if the subject matter disclosed had, before such disclosure was made or before such subject matter was effectively filed in a U.S. patent, U.S. patent application publication, or WIPO published application, been publicly disclosed by the inventor or a joint inventor or another who obtained the subject matter disclosed directly or indirectly from the inventor or a joint inventor.

Jump to MPEP Source · 37 CFR 1.130Grace Period – Intervening Disclosure (102(b)(1)(B))AIA 102(a)(2) – Earlier Filed Applications (MPEP 2154)1.130 Affidavit or Declaration (MPEP 2155)

Citations

Primary topicCitation
Statutory Authority for Examination35 U.S.C. § 100
Statutory Authority for Examination35 U.S.C. § 102
AIA Grace Period Exceptions (MPEP 2153)
Grace Period – Intervening Disclosure (102(b)(1)(B))
35 U.S.C. § 102(a)
AIA Grace Period Exceptions (MPEP 2153)
Grace Period – Intervening Disclosure (102(b)(1)(B))
35 U.S.C. § 102(b)
AIA Overview and Effective Dates35 U.S.C. § 120
AIA Overview and Effective Dates37 CFR § 1.109
AIA Grace Period Exceptions (MPEP 2153)
Grace Period – Intervening Disclosure (102(b)(1)(B))
37 CFR § 1.130
AIA Grace Period Exceptions (MPEP 2153)
Grace Period – Intervening Disclosure (102(b)(1)(B))
37 CFR § 1.130(a)
AIA Grace Period Exceptions (MPEP 2153)
Grace Period – Intervening Disclosure (102(b)(1)(B))
37 CFR § 1.130(b)
AIA Overview and Effective Dates
Determining Whether Application Is AIA or Pre-AIA
Key Changes Under AIA
37 CFR § 42.401
Statutory Authority for ExaminationMPEP § 2131
Statutory Authority for ExaminationMPEP § 2138
Statutory Authority for ExaminationMPEP § 2159

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: 2026-01-10