MPEP § 2001.06 — Sources of Information under 37 CFR 1.56 (Annotated Rules)

§2001.06 Sources of Information under 37 CFR 1.56

USPTO MPEP version: BlueIron's Update: 2026-01-17

This page consolidates and annotates all enforceable requirements under MPEP § 2001.06, 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.

Sources of Information under 37 CFR 1.56

This section addresses Sources of Information under 37 CFR 1.56. Primary authority: 37 CFR 1.56. Contains: 2 requirements, 1 prohibition, 1 permission, and 1 other statement.

Key Rules

Topic

Scope of Duty

3 rules
StatutoryInformativeAlways
[mpep-2001-06-37799906ae93a9216161b09f]
Duty to Disclose Material Information
Note:
All individuals must disclose material information they are aware of, regardless of the source or how they became aware.

All individuals covered by 37 CFR 1.56 (reproduced in MPEP § 2001.01) have a duty to disclose to the U.S. Patent and Trademark Office all material information they are aware of regardless of the source of or how they become aware of the information. See Brasseler, U.S.A. I, L.P. v. Stryker Sales Corp., 267 F.3d 1370, 1383, 60 USPQ2d 1482, 1490 (Fed. Cir. 2001) (“Once an attorney, or an applicant has notice that information exists that appears material and questionable, that person cannot ignore that notice in an effort to avoid his or her duty to disclose.”). Materiality controls whether information must be disclosed to the Office, not the circumstances under which or the source from which the information is obtained. If material, the information must be disclosed to the Office. The duty to disclose material information extends to information such individuals are aware of prior to or at the time of filing the application or become aware of during the prosecution thereof before the application is granted.

Jump to MPEP Source · 37 CFR 1.56Scope of DutyMaterial Information DefinitionDuty of Disclosure Fundamentals
StatutoryRequiredAlways
[mpep-2001-06-16b21e90667fce60bfe3c7e2]
Material Information Must Be Disclosed During Prosecution
Note:
Applicants and their representatives must disclose all material information to the U.S. Patent and Trademark Office at any time before an application is granted, including information known prior to or during prosecution.

All individuals covered by 37 CFR 1.56 (reproduced in MPEP § 2001.01) have a duty to disclose to the U.S. Patent and Trademark Office all material information they are aware of regardless of the source of or how they become aware of the information. See Brasseler, U.S.A. I, L.P. v. Stryker Sales Corp., 267 F.3d 1370, 1383, 60 USPQ2d 1482, 1490 (Fed. Cir. 2001) (“Once an attorney, or an applicant has notice that information exists that appears material and questionable, that person cannot ignore that notice in an effort to avoid his or her duty to disclose.”). Materiality controls whether information must be disclosed to the Office, not the circumstances under which or the source from which the information is obtained. If material, the information must be disclosed to the Office. The duty to disclose material information extends to information such individuals are aware of prior to or at the time of filing the application or become aware of during the prosecution thereof before the application is granted.

Jump to MPEP Source · 37 CFR 1.56Scope of DutyTiming of DutyMaterial Information Definition
StatutoryPermittedAlways
[mpep-2001-06-04eecb27015b9910afb562f3]
Sources of Material Information Must Be Disclosed
Note:
Individuals covered by 37 CFR 1.56 must disclose material information from various sources such as co-workers, trade shows, and related foreign or U.S. patent applications.

Individuals covered by 37 CFR 1.56 may be or become aware of material information from various sources such as, for example, co-workers, trade shows, communications from or with competitors, potential infringers, or other third parties, related foreign applications (see MPEP § 2001.06(a)), prior or copending United States patent applications (see MPEP § 2001.06(b)), related litigation and/or post-grant proceedings (see MPEP § 2001.06(c)), preliminary examination searches and supporting information related to regulatory review (see MPEP § 2001.06(e)).

Jump to MPEP Source · 37 CFR 1.56Scope of DutyMaterial Information DefinitionDuty of Disclosure Fundamentals
Topic

Individuals Under Duty

1 rules
StatutoryProhibitedAlways
[mpep-2001-06-2d9d630c69f8c362860ff53b]
Attorney and Applicant Must Disclose Material Information
Note:
An attorney or applicant must disclose material and questionable information to the U.S. Patent and Trademark Office, regardless of how they became aware of it.

All individuals covered by 37 CFR 1.56 (reproduced in MPEP § 2001.01) have a duty to disclose to the U.S. Patent and Trademark Office all material information they are aware of regardless of the source of or how they become aware of the information. See Brasseler, U.S.A. I, L.P. v. Stryker Sales Corp., 267 F.3d 1370, 1383, 60 USPQ2d 1482, 1490 (Fed. Cir. 2001) (“Once an attorney, or an applicant has notice that information exists that appears material and questionable, that person cannot ignore that notice in an effort to avoid his or her duty to disclose.”). Materiality controls whether information must be disclosed to the Office, not the circumstances under which or the source from which the information is obtained. If material, the information must be disclosed to the Office. The duty to disclose material information extends to information such individuals are aware of prior to or at the time of filing the application or become aware of during the prosecution thereof before the application is granted.

Jump to MPEP Source · 37 CFR 1.56Individuals Under DutyMaterial Information DefinitionDuty of Disclosure Fundamentals
Topic

Materiality Standard

1 rules
StatutoryRequiredAlways
[mpep-2001-06-21745d6cdc90897f2d6db29c]
Material Information Must Be Disclosed to Office Regardless of Source
Note:
The duty to disclose material information to the U.S. Patent and Trademark Office applies regardless of how or when the information was obtained.

All individuals covered by 37 CFR 1.56 (reproduced in MPEP § 2001.01) have a duty to disclose to the U.S. Patent and Trademark Office all material information they are aware of regardless of the source of or how they become aware of the information. See Brasseler, U.S.A. I, L.P. v. Stryker Sales Corp., 267 F.3d 1370, 1383, 60 USPQ2d 1482, 1490 (Fed. Cir. 2001) (“Once an attorney, or an applicant has notice that information exists that appears material and questionable, that person cannot ignore that notice in an effort to avoid his or her duty to disclose.”). Materiality controls whether information must be disclosed to the Office, not the circumstances under which or the source from which the information is obtained. If material, the information must be disclosed to the Office. The duty to disclose material information extends to information such individuals are aware of prior to or at the time of filing the application or become aware of during the prosecution thereof before the application is granted.

Jump to MPEP Source · 37 CFR 1.56Materiality StandardRequired DisclosuresIndividuals Under Duty

Citations

Primary topicCitation
Individuals Under Duty
Materiality Standard
Scope of Duty
37 CFR § 1.56
Individuals Under Duty
Materiality Standard
Scope of Duty
MPEP § 2001.01
Scope of DutyMPEP § 2001.06(a)
Scope of DutyMPEP § 2001.06(b)
Scope of DutyMPEP § 2001.06(c)
Scope of DutyMPEP § 2001.06(e)

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: 2026-01-17