MPEP § 2015 — Duties of Disclosure and Reasonable Inquiry Arise in Dealings With Other Government Agencies (Annotated Rules)

§2015 Duties of Disclosure and Reasonable Inquiry Arise in Dealings With Other Government Agencies

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

This page consolidates and annotates all enforceable requirements under MPEP § 2015, 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.

Duties of Disclosure and Reasonable Inquiry Arise in Dealings With Other Government Agencies

This section addresses Duties of Disclosure and Reasonable Inquiry Arise in Dealings With Other Government Agencies. Primary authority: 37 CFR 1.56, 37 CFR 1.56(c), and 37 CFR 1.56(a). Contains: 4 requirements, 3 guidance statements, 1 permission, and 7 other statements.

Key Rules

Topic

Material Information Definition

6 rules
StatutoryInformativeAlways
[mpep-2015-cbc3ff51e395cb7f9e31ffda]
Deliberate Suppression of Material Information Invalidates Patents
Note:
The U.S. Supreme Court will not enforce patents where deliberate steps were taken to suppress material information, violating the duty of disclosure.

Deliberate schemes or established practices to prevent individuals with a duty to disclose under 37 CFR 1.56(c) from obtaining knowledge of material information is not acting in accordance with candor and good faith under 37 CFR 1.56(a). For example, walling off the patent prosecution practitioners from the attorneys seeking FDA approval, as a way to prevent material information from being exchanged between the practitioners and attorneys, is inappropriate. The U.S. Supreme Court has refused to enforce patents where deliberate steps were taken to suppress material information. See, e.g., Keystone Driller Co. v. Gen. Excavator Co., 290 U.S. 240, 19 USPQ 228 (1933) (patent owner’s suit dismissed where the patent owner paid a third party to keep a prior use secret); Precision Instruments Mfg. Co. v. Auto. Maint. Mach. Co., 324 U.S. 806, 65 USPQ 133 (1945) (suit dismissed where patent owner actively suppressed evidence of perjury to the USPTO).

Jump to MPEP Source · 37 CFR 1.56(c)Material Information DefinitionMateriality StandardDuty of Disclosure
StatutoryInformativeAlways
[mpep-2015-b303eb89060a31e2489ad4ff]
USPTO Disclosure Not Satisfied by FDA List
Note:
Information and documents material to patentability must be submitted directly to the USPTO, not just listed on the FDA's website.

Though the FDA compiles paragraph IV certifications and publishes a list on its website, submitting this list to the USPTO does not satisfy the duty of disclosure for any material information submitted with the paragraph IV certification. These lists do not include patent numbers, relevant claims, or an explanation of the basis for the certification. Therefore, information and documents submitted with the paragraph IV certification that are material to patentability or to issues in proceedings pending before the USPTO, including the PTAB, must be submitted directly to the USPTO and as described above, the examiner may appropriately require submission of information concerning the certifications in certain situations.

Jump to MPEP SourceMaterial Information DefinitionMateriality StandardDuty of Disclosure
StatutoryRequiredAlways
[mpep-2015-b27e485a52ccd03883041464]
Material Information Must Be Submitted Directly to USPTO
Note:
Information and documents submitted with paragraph IV certifications that are material to patentability must be directly submitted to the USPTO, not just included in FDA lists.

Though the FDA compiles paragraph IV certifications and publishes a list on its website, submitting this list to the USPTO does not satisfy the duty of disclosure for any material information submitted with the paragraph IV certification. These lists do not include patent numbers, relevant claims, or an explanation of the basis for the certification. Therefore, information and documents submitted with the paragraph IV certification that are material to patentability or to issues in proceedings pending before the USPTO, including the PTAB, must be submitted directly to the USPTO and as described above, the examiner may appropriately require submission of information concerning the certifications in certain situations.

Jump to MPEP SourceMaterial Information DefinitionMateriality StandardDuty of Disclosure
MPEP GuidanceInformativeAlways
[mpep-2015-7e815b9f13c47a8b0b9b51b9]
Consistent Disclosure to USPTO and FDA Required
Note:
Patent owners must ensure that information provided to the USPTO is consistent with information submitted to other government agencies, such as the FDA, to avoid inequitable conduct.

Each individual with a duty to disclose, or party with a duty of reasonable inquiry, should ensure that the statements made to the USPTO and other Government agencies, or any statements made on their behalf to other Government agencies regarding the claimed subject matter, are consistent. See Belcher Pharms., LLC v. Hospira, Inc., 11 F.4th 1345, 2021 USPQ2d 909 (Fed. Cir. 2021) (affirming a district court’s determination of inequitable conduct because the patent owner’s Chief Science Officer failed to provide to the USPTO submissions he made to the FDA about the prior art that were inconsistent with positions taken before the USPTO during the prosecution of a pending patent application). Furthermore, providing material information to other Government agencies, including the FDA, while simultaneously withholding the same information from the USPTO undermines both the intent and spirit of the duty of disclosure and violates those duties. For example, in Bruno Independent Living Aids, Inc. v. Acorn Mobility Services, Ltd., 394 F.3d 1348, 1354, 73 USPQ2d 1593, 1598 (Fed. Cir. 2005), the U.S. Court of Appeals for the Federal Circuit inferred intent to deceive and found inequitable conduct occurred when an official involved in both the FDA and the USPTO submissions chose to disclose material prior art to the FDA but not to the USPTO.

Jump to MPEP SourceMaterial Information DefinitionElements of Inequitable ConductDuty of Disclosure Fundamentals
MPEP GuidanceRecommendedAlways
[mpep-2015-1f72dfb40ba29a19db683bb4]
Market Testing and Commercialization Materials Must Be Disclosed to USPTO
Note:
Patent applicants must disclose materials related to market testing, marketing, or commercialization to the USPTO when such information is material to patentability.

Activities or documents associated with market testing, marketing, or commercialization by the patent applicant can also be material to patentability, and therefore, when material, should be disclosed to the USPTO. See GS Cleantech Corp. v. Adkins Energy LLC, 951 F.3d 1310, 1330-1332, 2020 USPQ2d 10092 (Fed. Cir. 2020) (finding that a district court did not abuse its discretion in reaching its inequitable conduct determination where the district court concluded that the inventors and their lawyers made a deliberate decision to withhold material information from the USPTO regarding an offer for sale and reduction to practice of the claimed invention that would have implicated an on-sale bar to the granting of a patent; the lawyers filed with the USPTO a declaration containing a false statement about the timing of an offer for sale despite having in their possession materials that would call into question the veracity of the statement; and the inventors and lawyers subsequently failed to correct the false declaration). By following this guidance, it is expected that patent applicants can obtain more reliable patent protection and avoid the findings of inequitable conduct and sanctions.

Jump to MPEP SourceMaterial Information DefinitionMateriality StandardDisclosure via Supplemental Examination
MPEP GuidancePermittedAlways
[mpep-2015-5a958e6d09dc07cadecd609d]
Disclosure of Market Testing and Marketing Activities
Note:
Patent applicants must disclose material information related to market testing, marketing, or commercialization activities that could affect patentability.

Activities or documents associated with market testing, marketing, or commercialization by the patent applicant can also be material to patentability, and therefore, when material, should be disclosed to the USPTO. See GS Cleantech Corp. v. Adkins Energy LLC, 951 F.3d 1310, 1330-1332, 2020 USPQ2d 10092 (Fed. Cir. 2020) (finding that a district court did not abuse its discretion in reaching its inequitable conduct determination where the district court concluded that the inventors and their lawyers made a deliberate decision to withhold material information from the USPTO regarding an offer for sale and reduction to practice of the claimed invention that would have implicated an on-sale bar to the granting of a patent; the lawyers filed with the USPTO a declaration containing a false statement about the timing of an offer for sale despite having in their possession materials that would call into question the veracity of the statement; and the inventors and lawyers subsequently failed to correct the false declaration). By following this guidance, it is expected that patent applicants can obtain more reliable patent protection and avoid the findings of inequitable conduct and sanctions.

Jump to MPEP SourceMaterial Information DefinitionMateriality StandardDisclosure via Supplemental Examination
Topic

Individuals Under Duty

4 rules
StatutoryRecommendedAlways
[mpep-2015-91f24cf64dd7b4e308d3eded]
Individuals Must Review FDA Certifications for USPTO Submissions
Note:
Individuals with a duty to disclose must review documents received from other government agencies, such as FDA certifications in ANDAs, to determine if they should be submitted to the USPTO.

Similarly, each individual with a duty to disclose, or party with a duty of reasonable inquiry, should review documents it receives from other Government agencies to determine whether the information should be submitted to the USPTO. For example, when a company seeks FDA approval to market a generic drug before the expiration of patents related to the drug, the generic drug application (e.g., an Abbreviated New Drug Application (ANDA)) must contain a “paragraph IV certification” that the patents submitted to the FDA by the brand-name drug’s sponsor, listed in the FDA’s Approved Drug Products with Therapeutic Equivalence Evaluations (the Orange Book), and related to the drug are invalid, are unenforceable, or will not be infringed by the generic product. Except in limited circumstances, notice of a paragraph IV certification must also be communicated to the owner of the patent subject to the certification and to the New Drug Application holder. Such a notice includes a detailed statement providing factual and legal bases for the paragraph IV certification. 21 CFR 314.95(c)(7). Consequently, to assist USPTO staff in evaluating patentability effectively and efficiently, the party receiving a paragraph IV certification should review such documents to determine whether they are material to the patentability of any pending matters before the USPTO, such as pending patent applications, reexamination proceedings, or issues in proceedings pending before the PTAB. If the content of the detailed statement, or other information that is part of the ANDA process, is deemed material to patentability in a pending USPTO matter, then such information must be submitted to the USPTO during the pendency of the matter, to meet the duties of candor and good faith and disclosure under 37 CFR 1.56, 1.555, 42.11(a) or (c), or 11.18(b)(2).

Jump to MPEP Source · 37 CFR 1.56Individuals Under DutyDuty of Disclosure FundamentalsRequired Disclosures
StatutoryRequiredAlways
[mpep-2015-82214f715d07cb1cd75696dd]
Review of Paragraph IV Certifications for USPTO Submissions
Note:
Individuals with a duty to disclose must review and submit relevant information from generic drug applications to the USPTO when seeking FDA approval.

Similarly, each individual with a duty to disclose, or party with a duty of reasonable inquiry, should review documents it receives from other Government agencies to determine whether the information should be submitted to the USPTO. For example, when a company seeks FDA approval to market a generic drug before the expiration of patents related to the drug, the generic drug application (e.g., an Abbreviated New Drug Application (ANDA)) must contain a “paragraph IV certification” that the patents submitted to the FDA by the brand-name drug’s sponsor, listed in the FDA’s Approved Drug Products with Therapeutic Equivalence Evaluations (the Orange Book), and related to the drug are invalid, are unenforceable, or will not be infringed by the generic product. Except in limited circumstances, notice of a paragraph IV certification must also be communicated to the owner of the patent subject to the certification and to the New Drug Application holder. Such a notice includes a detailed statement providing factual and legal bases for the paragraph IV certification. 21 CFR 314.95(c)(7). Consequently, to assist USPTO staff in evaluating patentability effectively and efficiently, the party receiving a paragraph IV certification should review such documents to determine whether they are material to the patentability of any pending matters before the USPTO, such as pending patent applications, reexamination proceedings, or issues in proceedings pending before the PTAB. If the content of the detailed statement, or other information that is part of the ANDA process, is deemed material to patentability in a pending USPTO matter, then such information must be submitted to the USPTO during the pendency of the matter, to meet the duties of candor and good faith and disclosure under 37 CFR 1.56, 1.555, 42.11(a) or (c), or 11.18(b)(2).

Jump to MPEP Source · 37 CFR 1.56Individuals Under DutyTiming of DutyMaterial Information Definition
StatutoryRequiredAlways
[mpep-2015-af2671af77bcfbcb17d6d223]
Notice of Paragraph IV Certification Must Be Communicated to Patent Owner and NDA Holder
Note:
Except in limited circumstances, a detailed notice of paragraph IV certification must be communicated to the patent owner and New Drug Application holder.

Similarly, each individual with a duty to disclose, or party with a duty of reasonable inquiry, should review documents it receives from other Government agencies to determine whether the information should be submitted to the USPTO. For example, when a company seeks FDA approval to market a generic drug before the expiration of patents related to the drug, the generic drug application (e.g., an Abbreviated New Drug Application (ANDA)) must contain a “paragraph IV certification” that the patents submitted to the FDA by the brand-name drug’s sponsor, listed in the FDA’s Approved Drug Products with Therapeutic Equivalence Evaluations (the Orange Book), and related to the drug are invalid, are unenforceable, or will not be infringed by the generic product. Except in limited circumstances, notice of a paragraph IV certification must also be communicated to the owner of the patent subject to the certification and to the New Drug Application holder. Such a notice includes a detailed statement providing factual and legal bases for the paragraph IV certification. 21 CFR 314.95(c)(7). Consequently, to assist USPTO staff in evaluating patentability effectively and efficiently, the party receiving a paragraph IV certification should review such documents to determine whether they are material to the patentability of any pending matters before the USPTO, such as pending patent applications, reexamination proceedings, or issues in proceedings pending before the PTAB. If the content of the detailed statement, or other information that is part of the ANDA process, is deemed material to patentability in a pending USPTO matter, then such information must be submitted to the USPTO during the pendency of the matter, to meet the duties of candor and good faith and disclosure under 37 CFR 1.56, 1.555, 42.11(a) or (c), or 11.18(b)(2).

Jump to MPEP Source · 37 CFR 1.56Individuals Under DutyTiming of DutyMaterial Information Definition
MPEP GuidanceRecommendedAlways
[mpep-2015-6c176f3bd6458ea8685fd654]
Statements to Government Agencies Must Be Consistent
Note:
Individuals with a duty of disclosure must ensure their statements to the USPTO and other government agencies, including the FDA, regarding claimed subject matter are consistent.

Each individual with a duty to disclose, or party with a duty of reasonable inquiry, should ensure that the statements made to the USPTO and other Government agencies, or any statements made on their behalf to other Government agencies regarding the claimed subject matter, are consistent. See Belcher Pharms., LLC v. Hospira, Inc., 11 F.4th 1345, 2021 USPQ2d 909 (Fed. Cir. 2021) (affirming a district court’s determination of inequitable conduct because the patent owner’s Chief Science Officer failed to provide to the USPTO submissions he made to the FDA about the prior art that were inconsistent with positions taken before the USPTO during the prosecution of a pending patent application). Furthermore, providing material information to other Government agencies, including the FDA, while simultaneously withholding the same information from the USPTO undermines both the intent and spirit of the duty of disclosure and violates those duties. For example, in Bruno Independent Living Aids, Inc. v. Acorn Mobility Services, Ltd., 394 F.3d 1348, 1354, 73 USPQ2d 1593, 1598 (Fed. Cir. 2005), the U.S. Court of Appeals for the Federal Circuit inferred intent to deceive and found inequitable conduct occurred when an official involved in both the FDA and the USPTO submissions chose to disclose material prior art to the FDA but not to the USPTO.

Jump to MPEP SourceIndividuals Under DutyDuty of Disclosure FundamentalsRequired Disclosures
Topic

Timing of Duty

3 rules
StatutoryRequiredAlways
[mpep-2015-3c5caa9bdee6069bdd6e3a81]
Review Paragraph IV Certification for Patentability
Note:
Parties receiving a paragraph IV certification must review the detailed statement to determine if it is material to any pending USPTO matters and submit relevant information to meet disclosure duties.

Similarly, each individual with a duty to disclose, or party with a duty of reasonable inquiry, should review documents it receives from other Government agencies to determine whether the information should be submitted to the USPTO. For example, when a company seeks FDA approval to market a generic drug before the expiration of patents related to the drug, the generic drug application (e.g., an Abbreviated New Drug Application (ANDA)) must contain a “paragraph IV certification” that the patents submitted to the FDA by the brand-name drug’s sponsor, listed in the FDA’s Approved Drug Products with Therapeutic Equivalence Evaluations (the Orange Book), and related to the drug are invalid, are unenforceable, or will not be infringed by the generic product. Except in limited circumstances, notice of a paragraph IV certification must also be communicated to the owner of the patent subject to the certification and to the New Drug Application holder. Such a notice includes a detailed statement providing factual and legal bases for the paragraph IV certification. 21 CFR 314.95(c)(7). Consequently, to assist USPTO staff in evaluating patentability effectively and efficiently, the party receiving a paragraph IV certification should review such documents to determine whether they are material to the patentability of any pending matters before the USPTO, such as pending patent applications, reexamination proceedings, or issues in proceedings pending before the PTAB. If the content of the detailed statement, or other information that is part of the ANDA process, is deemed material to patentability in a pending USPTO matter, then such information must be submitted to the USPTO during the pendency of the matter, to meet the duties of candor and good faith and disclosure under 37 CFR 1.56, 1.555, 42.11(a) or (c), or 11.18(b)(2).

Jump to MPEP Source · 37 CFR 1.56Timing of DutyMaterial Information DefinitionDuty of Disclosure Fundamentals
StatutoryInformativeAlways
[mpep-2015-9ee06be7ca59b59905215889]
Preventing Information Exchange Is Not Candor
Note:
Patent prosecution practitioners and attorneys seeking FDA approval must not be walled off to prevent material information from being exchanged, as it goes against the duty of candor.

Deliberate schemes or established practices to prevent individuals with a duty to disclose under 37 CFR 1.56(c) from obtaining knowledge of material information is not acting in accordance with candor and good faith under 37 CFR 1.56(a). For example, walling off the patent prosecution practitioners from the attorneys seeking FDA approval, as a way to prevent material information from being exchanged between the practitioners and attorneys, is inappropriate. The U.S. Supreme Court has refused to enforce patents where deliberate steps were taken to suppress material information. See, e.g., Keystone Driller Co. v. Gen. Excavator Co., 290 U.S. 240, 19 USPQ 228 (1933) (patent owner’s suit dismissed where the patent owner paid a third party to keep a prior use secret); Precision Instruments Mfg. Co. v. Auto. Maint. Mach. Co., 324 U.S. 806, 65 USPQ 133 (1945) (suit dismissed where patent owner actively suppressed evidence of perjury to the USPTO).

Jump to MPEP Source · 37 CFR 1.56(c)Timing of DutyMaterial Information DefinitionMateriality Standard
MPEP GuidanceInformativeAlways
[mpep-2015-7bcd2e7e23b8d6e715ce6865]
Disclosures to USPTO and FDA Must Be Consistent
Note:
Patent owners must ensure that information provided to the USPTO matches what is submitted to other government agencies like the FDA, avoiding inconsistent disclosures.

Each individual with a duty to disclose, or party with a duty of reasonable inquiry, should ensure that the statements made to the USPTO and other Government agencies, or any statements made on their behalf to other Government agencies regarding the claimed subject matter, are consistent. See Belcher Pharms., LLC v. Hospira, Inc., 11 F.4th 1345, 2021 USPQ2d 909 (Fed. Cir. 2021) (affirming a district court’s determination of inequitable conduct because the patent owner’s Chief Science Officer failed to provide to the USPTO submissions he made to the FDA about the prior art that were inconsistent with positions taken before the USPTO during the prosecution of a pending patent application). Furthermore, providing material information to other Government agencies, including the FDA, while simultaneously withholding the same information from the USPTO undermines both the intent and spirit of the duty of disclosure and violates those duties. For example, in Bruno Independent Living Aids, Inc. v. Acorn Mobility Services, Ltd., 394 F.3d 1348, 1354, 73 USPQ2d 1593, 1598 (Fed. Cir. 2005), the U.S. Court of Appeals for the Federal Circuit inferred intent to deceive and found inequitable conduct occurred when an official involved in both the FDA and the USPTO submissions chose to disclose material prior art to the FDA but not to the USPTO.

Jump to MPEP SourceTiming of DutyMaterial Information DefinitionElements of Inequitable Conduct
Topic

Scope of Duty

2 rules
StatutoryInformativeAlways
[mpep-2015-8a42b085f699e7b31ec02a18]
Preventing Disclosure Is Not Candor
Note:
Individuals with a duty to disclose under 37 CFR 1.56(c) must not be prevented from obtaining material information, as it goes against the requirement for candor and good faith under 37 CFR 1.56(a).

Deliberate schemes or established practices to prevent individuals with a duty to disclose under 37 CFR 1.56(c) from obtaining knowledge of material information is not acting in accordance with candor and good faith under 37 CFR 1.56(a). For example, walling off the patent prosecution practitioners from the attorneys seeking FDA approval, as a way to prevent material information from being exchanged between the practitioners and attorneys, is inappropriate. The U.S. Supreme Court has refused to enforce patents where deliberate steps were taken to suppress material information. See, e.g., Keystone Driller Co. v. Gen. Excavator Co., 290 U.S. 240, 19 USPQ 228 (1933) (patent owner’s suit dismissed where the patent owner paid a third party to keep a prior use secret); Precision Instruments Mfg. Co. v. Auto. Maint. Mach. Co., 324 U.S. 806, 65 USPQ 133 (1945) (suit dismissed where patent owner actively suppressed evidence of perjury to the USPTO).

Jump to MPEP Source · 37 CFR 1.56(c)Scope of DutyMaterial Information DefinitionDuty of Disclosure Fundamentals
StatutoryInformativeAlways
[mpep-2015-e2ffc6f660c9f72e525e83e5]
Patent Owner Must Not Suppress Material Information
Note:
The patent owner is required to disclose material information and cannot take deliberate steps to suppress it, as demonstrated by cases like Keystone Driller Co. v. Gen. Excavator Co. and Precision Instruments Mfg. Co. v. Auto. Maint. Mach. Co.

Deliberate schemes or established practices to prevent individuals with a duty to disclose under 37 CFR 1.56(c) from obtaining knowledge of material information is not acting in accordance with candor and good faith under 37 CFR 1.56(a). For example, walling off the patent prosecution practitioners from the attorneys seeking FDA approval, as a way to prevent material information from being exchanged between the practitioners and attorneys, is inappropriate. The U.S. Supreme Court has refused to enforce patents where deliberate steps were taken to suppress material information. See, e.g., Keystone Driller Co. v. Gen. Excavator Co., 290 U.S. 240, 19 USPQ 228 (1933) (patent owner’s suit dismissed where the patent owner paid a third party to keep a prior use secret); Precision Instruments Mfg. Co. v. Auto. Maint. Mach. Co., 324 U.S. 806, 65 USPQ 133 (1945) (suit dismissed where patent owner actively suppressed evidence of perjury to the USPTO).

Jump to MPEP Source · 37 CFR 1.56(c)Scope of DutyTiming of DutyMaterial Information Definition

Citations

Primary topicCitation
Individuals Under Duty
Timing of Duty
37 CFR § 1.56
Material Information Definition
Scope of Duty
Timing of Duty
37 CFR § 1.56(a)
Material Information Definition
Scope of Duty
Timing of Duty
37 CFR § 1.56(c)
Individuals Under Duty
Material Information Definition
Timing of Duty
in Bruno Independent Living Aids, Inc. v. Acorn Mobility Services, Ltd., 394 F.3d 1348, 1354, 73 USPQ2d 1593, 1598 (Fed. Cir. 2005)

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