MPEP § 1901.02 — Information Which Can Be Relied on in Protest (Annotated Rules)

§1901.02 Information Which Can Be Relied on in Protest

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

This page consolidates and annotates all enforceable requirements under MPEP § 1901.02, 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.

Information Which Can Be Relied on in Protest

This section addresses Information Which Can Be Relied on in Protest. Primary authority: 37 CFR 1.291 and 37 CFR 1.291(c). Contains: 2 requirements, 1 prohibition, 1 guidance statement, 8 permissions, and 6 other statements.

Key Rules

Topic

Protest Content and Evidence

10 rules
StatutoryPermittedAlways
[mpep-1901-02-982eaa75cdcf95263c09d70f]
Protests May Use Any Adverse Information
Note:
Patent protests can be based on any facts or information that oppose patentability, not just prior art documents.

Any information which, in the protestor’s opinion, would make the grant of a patent improper can be relied on in a protest under 37 CFR 1.291. While prior art documents, such as patents and publications, are most often the types of information relied on in protests, 37 CFR 1.291 is not limited to prior art documents. Protests may be based on any facts or information adverse to patentability. The content and substance of the protest are more important than whether prior art documents, or some other form of evidence adverse to patentability, are being relied on. The Office recognizes that when evidence other than prior art documents is relied on, problems may arise as to authentication and the probative value to assign to such evidence. However, the fact that such problems may arise, and have to be resolved, does not preclude the Office from considering such evidence, nor does it mean that such evidence cannot be relied on in a protest under 37 CFR 1.291. Information in a protest should be set forth in the manner required by 37 CFR 1.291(c).

Jump to MPEP Source · 37 CFR 1.291Protest Content and EvidencePrior Art Submissions in ProtestsProtest Practice
StatutoryRequiredAlways
[mpep-1901-02-1ba7e2d6512f48425a4af432]
Protest Content Must Follow Specific Format
Note:
Information in a protest must be presented according to the requirements specified by 37 CFR 1.291(c).

Any information which, in the protestor’s opinion, would make the grant of a patent improper can be relied on in a protest under 37 CFR 1.291. While prior art documents, such as patents and publications, are most often the types of information relied on in protests, 37 CFR 1.291 is not limited to prior art documents. Protests may be based on any facts or information adverse to patentability. The content and substance of the protest are more important than whether prior art documents, or some other form of evidence adverse to patentability, are being relied on. The Office recognizes that when evidence other than prior art documents is relied on, problems may arise as to authentication and the probative value to assign to such evidence. However, the fact that such problems may arise, and have to be resolved, does not preclude the Office from considering such evidence, nor does it mean that such evidence cannot be relied on in a protest under 37 CFR 1.291. Information in a protest should be set forth in the manner required by 37 CFR 1.291(c).

Jump to MPEP Source · 37 CFR 1.291Protest Content and EvidenceProtest PracticePrior Art Submissions in Protests
StatutoryPermittedAlways
[mpep-1901-02-c57c2e9459846b2bdc1dc74f]
Fraud or Disclosure Violation Can Be Protested
Note:
Information indicating fraud or a violation of the duty to disclose can be used in a protest under 37 CFR 1.291.

The following are examples of the kinds of information, in addition to prior art documents, which can be relied on in a protest under 37 CFR 1.291:

(G) Information indicating “fraud” or “violation of the duty of disclosure” under 37 CFR 1.56 may be the subject of a protest under 37 CFR 1.291.

Jump to MPEP Source · 37 CFR 1.291Protest Content and EvidenceProtest PracticePrior Art Submissions in Protests
StatutoryInformativeAlways
[mpep-1901-02-a0ed5bac03fcfa2db23cf2ef]
Other Forms of Evidence for Protest
Note:
This rule outlines various types of evidence, including litigation-related materials, that can be submitted in a protest under 37 CFR 1.291.

Different forms of evidence may accompany, or be submitted as a part of, a protest under 37 CFR 1.291. Conventional prior art documents such as patents and publications are the most common form of evidence. However, other forms of evidence can likewise be submitted. Some representative examples of other forms of evidence are litigation-related materials such as complaints, answers, depositions, answers to interrogatories, exhibits, transcripts of hearings or trials, court orders and opinions, stipulations of the parties, etc. Where only a portion of the litigation-related materials is relevant to the protest, protestors are encouraged to submit only the relevant portion(s).

Jump to MPEP Source · 37 CFR 1.291Protest Content and EvidencePrior Art Submissions in ProtestsProtest Practice
StatutoryInformativeAlways
[mpep-1901-02-571b5161267ef52283ea573c]
Submit Only Relevant Litigation Portions
Note:
Protestors should submit only the portions of litigation-related materials that are relevant to their protest.

Different forms of evidence may accompany, or be submitted as a part of, a protest under 37 CFR 1.291. Conventional prior art documents such as patents and publications are the most common form of evidence. However, other forms of evidence can likewise be submitted. Some representative examples of other forms of evidence are litigation-related materials such as complaints, answers, depositions, answers to interrogatories, exhibits, transcripts of hearings or trials, court orders and opinions, stipulations of the parties, etc. Where only a portion of the litigation-related materials is relevant to the protest, protestors are encouraged to submit only the relevant portion(s).

Jump to MPEP Source · 37 CFR 1.291Protest Content and EvidenceProtest PracticePrior Art Submissions in Protests
StatutoryPermittedAlways
[mpep-1901-02-896317cbc7f2b15f724c5ab9]
Evidence for Public Use or Sale Must Be Supported by Affidavits
Note:
Protesters must submit evidence of public use or sale along with affidavits explaining the source and relevance of the evidence.

In a protest based on an alleged public use or sale, evidence of such public use or sale may be submitted along with affidavits or declarations identifying the source(s) of the evidence and explaining its relevance and meaning. Such evidence might include documents containing offers for sale, orders, invoices, receipts, delivery schedules, etc. The Office will make a decision as to whether or not public use or sale has been established based on the evidence the Office has available.

Jump to MPEP SourceProtest Content and EvidenceProtest PracticeProtest Handling Procedure
StatutoryInformativeAlways
[mpep-1901-02-572536ac2c4e37e13c7bd9cc]
Evidence for Public Use or Sale Must Be Submitted
Note:
The Office will decide if public use or sale has occurred based on the evidence provided.

In a protest based on an alleged public use or sale, evidence of such public use or sale may be submitted along with affidavits or declarations identifying the source(s) of the evidence and explaining its relevance and meaning. Such evidence might include documents containing offers for sale, orders, invoices, receipts, delivery schedules, etc. The Office will make a decision as to whether or not public use or sale has been established based on the evidence the Office has available.

Jump to MPEP SourceProtest Content and EvidenceProtest Handling ProcedureProtest Practice
StatutoryRequiredAlways
[mpep-1901-02-29a594d232ed270a7435dab6]
Protest Evidence Must Be Authenticated and Valued
Note:
Protestors must ensure their evidence is authentic and has probative value, as the Office will evaluate each submission.

While the forms in which evidence and/or information may be submitted with, or as a part of, a protest under 37 CFR 1.291, are not limited, protestors must recognize that such submissions may encounter problems such as establishing authenticity and/or the probative value to apply to the evidence. Obviously, the Office will have to evaluate each item of evidence and/or information submitted with a view as to both its authenticity and what weight to give thereto.

Jump to MPEP Source · 37 CFR 1.291Protest Content and EvidenceProtest Filing RequirementsProtest Practice
StatutoryInformativeAlways
[mpep-1901-02-19bc3bcf335d607fc90d7aef]
Office Must Evaluate Evidence for Authenticity and Weight
Note:
The Office will assess the authenticity and probative value of any evidence submitted with a protest.

While the forms in which evidence and/or information may be submitted with, or as a part of, a protest under 37 CFR 1.291, are not limited, protestors must recognize that such submissions may encounter problems such as establishing authenticity and/or the probative value to apply to the evidence. Obviously, the Office will have to evaluate each item of evidence and/or information submitted with a view as to both its authenticity and what weight to give thereto.

Jump to MPEP Source · 37 CFR 1.291Protest Content and EvidenceProtest Filing RequirementsProtest Practice
StatutoryPermittedAlways
[mpep-1901-02-d00f6e48af62fad7cb36abb0]
Court-Imposed Protective Info Can Be Submitted in Protest
Note:
Trade secret information subject to a court-imposed protective order can be included in a protest under 37 CFR 1.291, but will be made public if deemed important by the examiner.

Information which is subject to a court-imposed protective or secrecy order may be submitted with, or as a part of, a protest under 37 CFR 1.291. Trade secret information which was obtained by a protestor through agreements with others can likewise be submitted. Such information, if submitted in accordance with MPEP § 724, will be treated as set forth therein and will be made public if a reasonable examiner would consider the information important in deciding whether to allow the application to issue as a patent. To ensure that the Office recognizes the protected/secret material, the protestor should follow the procedures in MPEP § 724.

Jump to MPEP Source · 37 CFR 1.291Protest Content and EvidenceProtest PracticePrior Art Submissions in Protests
Topic

Prior Art Submissions in Protests

8 rules
StatutoryPermittedAlways
[mpep-1901-02-a93415b09e4b741498a62a21]
Any Information Adverse to Patentability Can Be Used in Protest
Note:
Protests can be based on any information that the protestor believes makes a patent improper, not limited to prior art documents.

Any information which, in the protestor’s opinion, would make the grant of a patent improper can be relied on in a protest under 37 CFR 1.291. While prior art documents, such as patents and publications, are most often the types of information relied on in protests, 37 CFR 1.291 is not limited to prior art documents. Protests may be based on any facts or information adverse to patentability. The content and substance of the protest are more important than whether prior art documents, or some other form of evidence adverse to patentability, are being relied on. The Office recognizes that when evidence other than prior art documents is relied on, problems may arise as to authentication and the probative value to assign to such evidence. However, the fact that such problems may arise, and have to be resolved, does not preclude the Office from considering such evidence, nor does it mean that such evidence cannot be relied on in a protest under 37 CFR 1.291. Information in a protest should be set forth in the manner required by 37 CFR 1.291(c).

Jump to MPEP Source · 37 CFR 1.291Prior Art Submissions in ProtestsProtest Content and EvidenceProtest Practice
StatutoryInformativeAlways
[mpep-1901-02-5fc03c9da3d441129d563adc]
Content Over Form In Protests
Note:
The importance of the substance and content of a protest outweighs the type of evidence, such as prior art documents, being relied upon.

Any information which, in the protestor’s opinion, would make the grant of a patent improper can be relied on in a protest under 37 CFR 1.291. While prior art documents, such as patents and publications, are most often the types of information relied on in protests, 37 CFR 1.291 is not limited to prior art documents. Protests may be based on any facts or information adverse to patentability. The content and substance of the protest are more important than whether prior art documents, or some other form of evidence adverse to patentability, are being relied on. The Office recognizes that when evidence other than prior art documents is relied on, problems may arise as to authentication and the probative value to assign to such evidence. However, the fact that such problems may arise, and have to be resolved, does not preclude the Office from considering such evidence, nor does it mean that such evidence cannot be relied on in a protest under 37 CFR 1.291. Information in a protest should be set forth in the manner required by 37 CFR 1.291(c).

Jump to MPEP Source · 37 CFR 1.291Prior Art Submissions in ProtestsProtest Content and EvidenceProtest Practice
StatutoryProhibitedAlways
[mpep-1901-02-a1da729e855d360a98c78e7c]
Office May Consider Non-Prior Art Evidence in Protests
Note:
The Office can consider evidence other than prior art documents in protests, despite potential authentication and probative value issues.

Any information which, in the protestor’s opinion, would make the grant of a patent improper can be relied on in a protest under 37 CFR 1.291. While prior art documents, such as patents and publications, are most often the types of information relied on in protests, 37 CFR 1.291 is not limited to prior art documents. Protests may be based on any facts or information adverse to patentability. The content and substance of the protest are more important than whether prior art documents, or some other form of evidence adverse to patentability, are being relied on. The Office recognizes that when evidence other than prior art documents is relied on, problems may arise as to authentication and the probative value to assign to such evidence. However, the fact that such problems may arise, and have to be resolved, does not preclude the Office from considering such evidence, nor does it mean that such evidence cannot be relied on in a protest under 37 CFR 1.291. Information in a protest should be set forth in the manner required by 37 CFR 1.291(c).

Jump to MPEP Source · 37 CFR 1.291Prior Art Submissions in ProtestsProtest Content and EvidenceProtest Practice
StatutoryPermittedAlways
[mpep-1901-02-4d08fcaa0d77cc8a3bf23450]
Types of Information for Patent Protest
Note:
This rule outlines the various types of information, including prior art and more, that can be used in a protest under 37 CFR 1.291 to challenge patentability.
The following are examples of the kinds of information, in addition to prior art documents, which can be relied on in a protest under 37 CFR 1.291:
  • (A) Information demonstrating that the invention was publicly known or used by others and is barred from patenting under 35 U.S.C. 102(a)(1) and/or 103 or pre-AIA 35 U.S.C. 102(a) and/or 103.
  • (B) Information that the invention was in public use or on sale and is barred from patenting under 35 U.S.C. 102(a)(1) or pre-AIA 35 U.S.C. 102(b).
  • (C) Information that the inventor “has abandoned the invention” (pre-AIA 35 U.S.C. 102(c)) or “did not himself invent the subject matter sought to be patented” (35 U.S.C. 101 and/or pre-AIA 35 U.S.C. 102(f)).
  • (D) Information relating to inventorship under pre-AIA 35 U.S.C. 102(g).
  • (E) Information relating to compliance with 35 U.S.C. 112.
  • (F) Any other information demonstrating that the application lacks compliance with the statutory requirements for patentability.
  • (G) Information indicating “fraud” or “violation of the duty of disclosure” under 37 CFR 1.56 may be the subject of a protest under 37 CFR 1.291. Protests raising fraud or other inequitable conduct issues will be entered in the application file, generally without comment on those issues. 37 CFR 1.291(e). See MPEP § 2013.
Jump to MPEP Source · 37 CFR 1.291Prior Art Submissions in ProtestsProtest Content and EvidenceProtest Practice
StatutoryInformativeAlways
[mpep-1901-02-0c6a6db8eb9569589174d68d]
Protests Raising Fraud Issues Must Be Filed
Note:
Protests alleging fraud or other inequitable conduct must be entered in the application file without comment on those issues.

The following are examples of the kinds of information, in addition to prior art documents, which can be relied on in a protest under 37 CFR 1.291:

Protests raising fraud or other inequitable conduct issues will be entered in the application file, generally without comment on those issues.

Jump to MPEP Source · 37 CFR 1.291Prior Art Submissions in ProtestsProtest Content and EvidenceProtest Practice
StatutoryPermittedAlways
[mpep-1901-02-2235c53be97a71c191e6008f]
Types of Evidence for Protests
Note:
This rule outlines that various forms of evidence, including conventional prior art documents and litigation-related materials, can be submitted as part of a protest under 37 CFR 1.291.

Different forms of evidence may accompany, or be submitted as a part of, a protest under 37 CFR 1.291. Conventional prior art documents such as patents and publications are the most common form of evidence. However, other forms of evidence can likewise be submitted. Some representative examples of other forms of evidence are litigation-related materials such as complaints, answers, depositions, answers to interrogatories, exhibits, transcripts of hearings or trials, court orders and opinions, stipulations of the parties, etc. Where only a portion of the litigation-related materials is relevant to the protest, protestors are encouraged to submit only the relevant portion(s).

Jump to MPEP Source · 37 CFR 1.291Prior Art Submissions in ProtestsProtest Content and EvidenceProtest Practice
StatutoryPermittedAlways
[mpep-1901-02-a160ed2854c2c7e652126e24]
Trade Secrets Can Be Submitted in Protests
Note:
Trade secret information obtained through agreements can be submitted during a protest if it meets MPEP §724 requirements and is deemed important by the examiner.

Information which is subject to a court-imposed protective or secrecy order may be submitted with, or as a part of, a protest under 37 CFR 1.291. Trade secret information which was obtained by a protestor through agreements with others can likewise be submitted. Such information, if submitted in accordance with MPEP § 724, will be treated as set forth therein and will be made public if a reasonable examiner would consider the information important in deciding whether to allow the application to issue as a patent. To ensure that the Office recognizes the protected/secret material, the protestor should follow the procedures in MPEP § 724.

Jump to MPEP Source · 37 CFR 1.291Prior Art Submissions in ProtestsExaminer Action on ProtestProtest Content and Evidence
StatutoryRecommendedAlways
[mpep-1901-02-b4d0b926d00b7a676c262341]
Procedures for Submitting Protected Information in Protests
Note:
Follow MPEP § 724 to ensure the Office recognizes and handles protected or secret material submitted as part of a protest.

Information which is subject to a court-imposed protective or secrecy order may be submitted with, or as a part of, a protest under 37 CFR 1.291. Trade secret information which was obtained by a protestor through agreements with others can likewise be submitted. Such information, if submitted in accordance with MPEP § 724, will be treated as set forth therein and will be made public if a reasonable examiner would consider the information important in deciding whether to allow the application to issue as a patent. To ensure that the Office recognizes the protected/secret material, the protestor should follow the procedures in MPEP § 724.

Jump to MPEP Source · 37 CFR 1.291Prior Art Submissions in ProtestsExaminer Action on ProtestProtest Content and Evidence
Topic

Pre-AIA 102(a) – Known or Used (MPEP 2132)

1 rules
StatutoryInformativeAlways
[mpep-1901-02-85b8064305a626d42765d897]
Information Showing Public Use Bars Patenting
Note:
Provides examples of information demonstrating that an invention was publicly known or used, which bars patenting under pre-AIA and AIA sections 102(a) and 103.

The following are examples of the kinds of information, in addition to prior art documents, which can be relied on in a protest under 37 CFR 1.291 (A) Information demonstrating that the invention was publicly known or used by others and is barred from patenting under 35 U.S.C. 102(a)(1) and/or 103 or pre-AIA 35 U.S.C. 102(a) and/or 103.

Jump to MPEP Source · 37 CFR 1.291Pre-AIA 102(a) – Known or Used (MPEP 2132)Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
Topic

On Sale Under AIA (MPEP 2152.02(d))

1 rules
StatutoryInformativeAlways
[mpep-1901-02-822291461114fd8781d251a7]
Information on Public Use or Sale Required for Protest
Note:
The rule requires providing evidence that the invention was in public use or on sale, which bars patenting under AIA 102(a)(1) or pre-AIA 102(b).

The following are examples of the kinds of information, in addition to prior art documents, which can be relied on in a protest under 37 CFR 1.291:

(B) Information that the invention was in public use or on sale and is barred from patenting under 35 U.S.C. 102(a)(1) or pre-AIA 35 U.S.C. 102(b).

Jump to MPEP Source · 37 CFR 1.291On Sale Under AIA (MPEP 2152.02(d))Public Use Under AIA (MPEP 2152.02(c))AIA 102(a)(1) – Prior Art Categories (MPEP 2152.02)
Topic

Pre-AIA 102(c) – Abandonment (MPEP 2134)

1 rules
StatutoryInformativeAlways
[mpep-1901-02-a3b634aeec07ae5936d027c5]
Inventor Abandonment or Lack of Invention
Note:
This rule outlines the evidence that can be used to demonstrate an inventor has abandoned their invention or did not invent the claimed subject matter.

The following are examples of the kinds of information, in addition to prior art documents, which can be relied on in a protest under 37 CFR 1.291:

(C) Information that the inventor “has abandoned the invention” (pre-AIA 35 U.S.C. 102(c)) or “did not himself invent the subject matter sought to be patented” (35 U.S.C. 101 and/or pre-AIA 35 U.S.C. 102(f)).

Jump to MPEP Source · 37 CFR 1.291Pre-AIA 102(c) – Abandonment (MPEP 2134)Pre-AIA 102(f) – Derivation (MPEP 2137)Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
Topic

Protest Practice

1 rules
StatutoryInformativeAlways
[mpep-1901-02-8109b4393b72647169bd9f81]
Information for Protest Allowed
Note:
Provides examples of information that can be relied on in a protest under 37 CFR 1.291, including fraud or duty of disclosure violations.

The following are examples of the kinds of information, in addition to prior art documents, which can be relied on in a protest under 37 CFR 1.291:

37 CFR 1.291(e). See MPEP § 2013.

Jump to MPEP Source · 37 CFR 1.291Protest PracticePrior Art Submissions in ProtestsProtest Content and Evidence

Citations

Primary topicCitation
Pre-AIA 102(c) – Abandonment (MPEP 2134)
Prior Art Submissions in Protests
35 U.S.C. § 101
Pre-AIA 102(a) – Known or Used (MPEP 2132)
Prior Art Submissions in Protests
35 U.S.C. § 102(a)
On Sale Under AIA (MPEP 2152.02(d))
Pre-AIA 102(a) – Known or Used (MPEP 2132)
Prior Art Submissions in Protests
35 U.S.C. § 102(a)(1)
On Sale Under AIA (MPEP 2152.02(d))
Prior Art Submissions in Protests
35 U.S.C. § 102(b)
Pre-AIA 102(c) – Abandonment (MPEP 2134)
Prior Art Submissions in Protests
35 U.S.C. § 102(c)
Pre-AIA 102(c) – Abandonment (MPEP 2134)
Prior Art Submissions in Protests
35 U.S.C. § 102(f)
Prior Art Submissions in Protests35 U.S.C. § 102(g)
Prior Art Submissions in Protests35 U.S.C. § 112
On Sale Under AIA (MPEP 2152.02(d))
Pre-AIA 102(a) – Known or Used (MPEP 2132)
Pre-AIA 102(c) – Abandonment (MPEP 2134)
Prior Art Submissions in Protests
Protest Content and Evidence
Protest Practice
37 CFR § 1.291
Prior Art Submissions in Protests
Protest Content and Evidence
37 CFR § 1.291(c)
Prior Art Submissions in Protests
Protest Content and Evidence
Protest Practice
37 CFR § 1.291(e)
Prior Art Submissions in Protests
Protest Content and Evidence
Protest Practice
37 CFR § 1.56
Prior Art Submissions in Protests
Protest Content and Evidence
Protest Practice
MPEP § 2013
Prior Art Submissions in Protests
Protest Content and Evidence
MPEP § 724

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