MPEP § 1406 — Citation and Consideration of References Cited in Original Patent (Annotated Rules)

§1406 Citation and Consideration of References Cited in Original Patent

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

This page consolidates and annotates all enforceable requirements under MPEP § 1406, 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.

Citation and Consideration of References Cited in Original Patent

This section addresses Citation and Consideration of References Cited in Original Patent. Primary authority: 37 CFR 1.97, 37 CFR 1.98(a)(2), and 37 CFR 1.56. Contains: 1 requirement, 1 prohibition, and 4 other statements.

Key Rules

Topic

Material Information Definition

3 rules
StatutoryInformativeAlways
[mpep-1406-f628b0c5418e5c68b2962f9e]
Continuing Duty to Disclose Material Information in Reissue Applications
Note:
Applicant must timely inform the Office of any material information regarding patentability that was not previously cited in the original patent.

See MPEP § 609.04(a). The Office imposes no responsibility on a reissue applicant to resubmit, in a reissue application, all the references cited in the patent for which reissue is sought. Rather, applicant has a continuing duty under 37 CFR 1.56 to timely apprise the Office of any information which is material to the patentability of the claims under consideration in the reissue application. See MPEP § 1418.

Jump to MPEP Source · 37 CFR 1.56Material Information DefinitionMateriality StandardDuty of Disclosure
StatutoryInformativeAlways
[mpep-1406-a4a40a557aa8dd33de843b11]
No Resubmission of Original References Required in Reissue Application
Note:
Applicants are not required to resubmit all references from the original patent in a reissue application. Instead, they must disclose any material information that affects claim patentability.

See MPEP § 609.04(a). The Office imposes no responsibility on a reissue applicant to resubmit, in a reissue application, all the references cited in the patent for which reissue is sought. Rather, applicant has a continuing duty under 37 CFR 1.56 to timely apprise the Office of any information which is material to the patentability of the claims under consideration in the reissue application. See MPEP § 1418.

Jump to MPEP Source · 37 CFR 1.56Material Information DefinitionMateriality StandardDuty of Disclosure
StatutoryInformativeAlways
[mpep-1406-d0f5d3945ab9775e946a0aa0]
Applicant Must Timely Disclose Material Information
Note:
The applicant has a continuing duty to inform the Office of any material information regarding patentability in a reissue application.

See MPEP § 609.04(a). The Office imposes no responsibility on a reissue applicant to resubmit, in a reissue application, all the references cited in the patent for which reissue is sought. Rather, applicant has a continuing duty under 37 CFR 1.56 to timely apprise the Office of any information which is material to the patentability of the claims under consideration in the reissue application. See MPEP § 1418.

Jump to MPEP Source · 37 CFR 1.56Material Information DefinitionMateriality StandardDuty of Disclosure
Topic

Content of Patent Application Publication

2 rules
StatutoryInformativeAlways
[mpep-1406-85903e01d8049108a6ab401f]
Requirement for Legible Copy of Listed References
Note:
Applicants must submit a legible copy of any reference listed in an IDS, unless the Office does not require it.

Should applicants wish to ensure that all of the references which were cited in the original patent are considered and cited in the reissue application, an information disclosure statement (IDS) in compliance with 37 CFR 1.97 and 1.98 should be filed in the reissue application. See MPEP § 609. The requirement for a copy of each U.S. patent or U.S. patent application publication listed in an IDS has been eliminated, unless required by the Office. 37 CFR 1.98(a)(2) requires a legible copy of:

(D) all other information or that portion which caused it to be listed.

Jump to MPEP Source · 37 CFR 1.97Content of Patent Application PublicationReissue Application FilingReissue Claim Requirements
StatutoryProhibitedAlways
[mpep-1406-658322cc239e430c8fb94db6]
Non-U.S. Patent Reference Not Available
Note:
Examiner will not consider a non-U.S. patent reference if the reissue applicant has not submitted a copy and cannot obtain it from any other source.

Where a copy of a reference other than a U.S. patent or U.S. patent application publication that was cited in the original patent is not available and cannot be obtained through any source other than the reissue applicant (who has not submitted the copy), the examiner will not consider that reference and therefore, will not list that reference on the PTO-892 form. If that reference was listed by the reissue applicant on a PTO/SB/08 form but a copy has not been provided, the examiner will line-through the reference to indicate that the reference has not been considered.

Jump to MPEP SourceContent of Patent Application PublicationReissue Claim RequirementsPublication of Patent Applications
Topic

Reissue Application Filing

1 rules
StatutoryRequiredAlways
[mpep-1406-a1fe55699446b456c2f4a1aa]
Requirement for IDS in Reissue Application
Note:
Applicants must file an information disclosure statement (IDS) complying with 37 CFR 1.97 and 1.98 to ensure all references from the original patent are considered in the reissue application.
Should applicants wish to ensure that all of the references which were cited in the original patent are considered and cited in the reissue application, an information disclosure statement (IDS) in compliance with 37 CFR 1.97 and 1.98 should be filed in the reissue application. See MPEP § 609. The requirement for a copy of each U.S. patent or U.S. patent application publication listed in an IDS has been eliminated, unless required by the Office. 37 CFR 1.98(a)(2) requires a legible copy of:
  • (A) each foreign patent;
  • (B) each publication or that portion which caused it to be listed, other than U.S. patents and U.S. patent application publications unless required by the Office;
  • (C) for each cited pending unpublished U.S. application, the application specification including the claims, and any drawing of the application, or that portion of the application which caused it to be listed including any claims directed to that portion; and
  • (D) all other information or that portion which caused it to be listed.
Jump to MPEP Source · 37 CFR 1.97Reissue Application FilingReissue Patent PracticeReissue Filing Requirements
Topic

Reissue Patent Practice

1 rules
StatutoryInformativeAlways
[mpep-1406-1c900cc95f12784b460a4574]
Reference Copy Required for Consideration
Note:
If a reference listed on PTO/SB/08 form lacks a copy, the examiner will not consider it and will line-through the reference.

Where a copy of a reference other than a U.S. patent or U.S. patent application publication that was cited in the original patent is not available and cannot be obtained through any source other than the reissue applicant (who has not submitted the copy), the examiner will not consider that reference and therefore, will not list that reference on the PTO-892 form. If that reference was listed by the reissue applicant on a PTO/SB/08 form but a copy has not been provided, the examiner will line-through the reference to indicate that the reference has not been considered.

Jump to MPEP SourceReissue Patent PracticeContent of Patent Application PublicationReissue Claim Requirements
Topic

Broadening Reissue (Two-Year Limit)

1 rules
MPEP GuidanceProhibitedAlways
[mpep-1406-92824ee1f255118dee13fa77]
References Must Be Listed on PTO-892 in Reissue Application
Note:
Examiner must list all cited references from original prosecution that are again applied in the reissue application on a PTO-892 form, unless they are no longer relevant due to claim scope narrowing.

In a reissue application, the examiner should consider all references that have been cited during the original prosecution of the patent, and list on a PTO-892 form any reference again cited/applied in the reissue application. See MPEP § 1455. It is noted that a reference cited in the original patent may no longer be relevant, e.g., in view of a narrowing of the claim scope in the reissue application, and therefore may not need to be listed on the PTO-892 form.

Jump to MPEP SourceBroadening Reissue (Two-Year Limit)Narrowing Reissue ClaimsReissue Claim Requirements

Citations

Primary topicCitation
Material Information Definition37 CFR § 1.56
Content of Patent Application Publication
Reissue Application Filing
37 CFR § 1.97
Content of Patent Application Publication
Reissue Application Filing
37 CFR § 1.98(a)(2)
Material Information DefinitionMPEP § 1418
Broadening Reissue (Two-Year Limit)MPEP § 1455
Content of Patent Application Publication
Reissue Application Filing
MPEP § 609
Material Information DefinitionMPEP § 609.04(a)

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