# MPEP § 2001: Duty of Disclosure, Candor, and Good Faith > Federal · Agency guidance · In force URL: https://www.frixlaw.com/law-library/statutes/MPEP_S2001 ## Section - **Citation:** MPEP § 2001 - **Heading:** Duty of Disclosure, Candor, and Good Faith - **Jurisdiction:** Federal - **Kind:** Agency guidance - **Status:** In force - **Text as of:** August 14, 2026 - **Source:** Compiled text - **Location:** USPTO MPEP / Chapter 2000 - Duty of Disclosure / MPEP § 2001 ## Text 37 CFR 1.56  Duty to disclose information material to patentability. [Editor Note: Para. (c)(3) below is applicable only to patent applications filed under 35 U.S.C. 111(a) or 363 on or after September 16, 2012.] (a) A patent by its very nature is affected with a public interest. The public interest is best served, and the most effective patent examination occurs when, at the time an application is being examined, the Office is aware of and evaluates the teachings of all information material to patentability. Each individual associated with the filing and prosecution of a patent application has a duty of candor and good faith in dealing with the Office, which includes a duty to disclose to the Office all information known to that individual to be material to patentability as defined in this section. The duty to disclose information exists with respect to each pending claim until the claim is cancelled or withdrawn from consideration, or the application becomes abandoned. Information material to the patentability of a claim that is cancelled or withdrawn from consideration need not be submitted if the information is not material to the patentability of any claim remaining under consideration in the application. There is no duty to submit information which is not material to the patentability of any existing claim. The duty to disclose all information known to be material to patentability is deemed to be satisfied if all information known to be material to patentability of any claim issued in a patent was cited by the Office or submitted to the Office in the manner prescribed by §§ 1.97(b) - application. There is no duty to submit information which is not material to the patentability of any existing claim. The duty to disclose all information known to be material to patentability is deemed to be satisfied if all information known to be material to patentability of any claim issued in a patent was cited by the Office or submitted to the Office in the manner prescribed by §§ 1.97(b) - (d) and 1.98 . However, no patent will be granted on an application in connection with which fraud on the Office was practiced or attempted or the duty of disclosure was violated through bad faith or intentional misconduct. The Office encourages applicants to carefully examine: (1) Prior art cited in search reports of a foreign patent office in a counterpart application, and (2) The closest information over which individuals associated with the filing or prosecution of a patent application believe any pending claim patentably defines, to make sure that any material information contained therein is disclosed to the Office. (b) Under this section, information is material to patentability when it is not cumulative to information already of record or being made of record in the application, and (1) It establishes, by itself or in combination with other information, a prima facie case of unpatentability of a claim; or (2) It refutes, or is inconsistent with, a position the applicant takes in: (i) Opposing an argument of unpatentability relied on by the Office, or (ii) Asserting an argument of patentability. (3) A prima facie case of unpatentability is established when the information compels a conclusion that a claim is unpatentable under the preponderance of evidence, burden-of-proof standard, giving each term in the claim its broadest reasonable construction consistent with the specification, and before any consideration is given to evidence which may be submitted in an attempt to establish a contrary conclusion of patentability. ntability is established when the information compels a conclusion that a claim is unpatentable under the preponderance of evidence, burden-of-proof standard, giving each term in the claim its broadest reasonable construction consistent with the specification, and before any consideration is given to evidence which may be submitted in an attempt to establish a contrary conclusion of patentability. (c) Individuals associated with the filing or prosecution of a patent application within the meaning of this section are: (1) Each inventor named in the application; (2) Each attorney or agent who prepares or prosecutes the application; and (3) Every other person who is substantively involved in the preparation or prosecution of the application and who is associated with the inventor, the applicant, an assignee, or anyone to whom there is an obligation to assign the application. (d) Individuals other than the attorney, agent or inventor may comply with this section by disclosing information to the attorney, agent, or inventor. (e) In any continuation-in-part application, the duty under this section includes the duty to disclose to the Office all information known to the person to be material to patentability, as defined in paragraph (b) of this section, which became available between the filing date of the prior application and the national or PCT international filing date of the continuation-in-part application. 37 CFR 1.56 (pre-AIA) Duty to disclose information material to patentability. [Editor Note: Para. (c)(3) below is not applicable to patent applications filed under 35 U.S.C. 111(a) or 363 on or after Sept. 16, 2012.] ***** this section, which became available between the filing date of the prior application and the national or PCT international filing date of the continuation-in-part application. 37 CFR 1.56 (pre-AIA) Duty to disclose information material to patentability. [Editor Note: Para. (c)(3) below is not applicable to patent applications filed under 35 U.S.C. 111(a) or 363 on or after Sept. 16, 2012.] ***** (c) Individuals associated with the filing or prosecution of a patent application within the meaning of this section are: ***** (3) Every other person who is substantively involved in the preparation or prosecution of the application and who is associated with the inventor, with the assignee or with anyone to whom there is an obligation to assign the application. ***** 37 CFR 1.56 defines the duty to disclose information to the Office. ## Nearby sections - [MPEP § 2000.01 Introduction](https://www.frixlaw.com/law-library/statutes/MPEP_S2000.01.md) - [MPEP § 2001 Duty of Disclosure, Candor, and Good Faith](https://www.frixlaw.com/law-library/statutes/MPEP_S2001.md) - [MPEP § 2001.01 Who Has Duty To Disclose](https://www.frixlaw.com/law-library/statutes/MPEP_S2001.01.md) - [MPEP § 2001.02 [Reserved]](https://www.frixlaw.com/law-library/statutes/MPEP_S2001.02.md) - [MPEP § 2001.03 To Whom Duty of Disclosure Is Owed](https://www.frixlaw.com/law-library/statutes/MPEP_S2001.03.md) - [MPEP § 2001.04 Information Under 37 CFR 1.56(a)](https://www.frixlaw.com/law-library/statutes/MPEP_S2001.04.md) - [MPEP § 2001.05 Materiality Under 37 CFR 1.56(b)](https://www.frixlaw.com/law-library/statutes/MPEP_S2001.05.md) - [MPEP § 2001.06 Sources of Information under 37 CFR 1.56](https://www.frixlaw.com/law-library/statutes/MPEP_S2001.06.md) - [MPEP § 2001.06(a) Prior Art Cited in Related Foreign Applications](https://www.frixlaw.com/law-library/statutes/MPEP_S2001.06(a).md) - [MPEP § 2001.06(b) Information Relating to or From Copending United States Patent Applications](https://www.frixlaw.com/law-library/statutes/MPEP_S2001.06(b).md) - [MPEP § 2001.06(c) Information From Related Litigation and/or Trial Proceedings](https://www.frixlaw.com/law-library/statutes/MPEP_S2001.06(c).md) - [MPEP § 2001.06(d) Information Relating to Claims Copied From a Patent](https://www.frixlaw.com/law-library/statutes/MPEP_S2001.06(d).md) - [MPEP § 2001.06(e) Information Relating to Regulatory Review](https://www.frixlaw.com/law-library/statutes/MPEP_S2001.06(e).md) - [MPEP § 2002 Disclosure — By Whom and How Made](https://www.frixlaw.com/law-library/statutes/MPEP_S2002.md) --- Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/MPEP_S2001. Check the current official text before relying on it. Not legal advice.