MPEP § 2303.02 — Other Outstanding Issues with Patents (Annotated Rules)

§2303.02 Other Outstanding Issues with Patents

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

This page consolidates and annotates all enforceable requirements under MPEP § 2303.02, 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.

Other Outstanding Issues with Patents

This section addresses Other Outstanding Issues with Patents. Primary authority: 35 U.S.C. 41(c), 35 U.S.C. 253, and 35 U.S.C. 254. Contains: 4 requirements, 2 permissions, and 4 other statements.

Key Rules

Topic

Assignee as Applicant Signature

4 rules
StatutoryInformativeAlways
[mpep-2303-02-6742b79a244c60d44212269f]
Statutory Disclaimer for Same Invention
Note:
A statutory disclaimer is filed for the sole patent claim that matches the applicant's claims, preventing interference since both must have identical inventions.

A statutory disclaimer under pre-AIA 35 U.S.C. 253, is filed for the sole patent claim directed to the same invention as the claims of the applicant. Since the patentee and applicant must both have claims to the same invention, in accordance with pre-AIA 35 U.S.C. 102(g)(1), no interference can be declared.

Jump to MPEP SourceAssignee as Applicant SignatureApplicant and Assignee Filing Under AIAHuman Organism Claims Prohibition
StatutoryRequiredAlways
[mpep-2303-02-a9078fb05f7e5f8cea5f4a4c]
Patentee and Applicant Must Claim Same Invention
Note:
No interference can be declared if the patentee and applicant both claim the same invention.

A statutory disclaimer under pre-AIA 35 U.S.C. 253, is filed for the sole patent claim directed to the same invention as the claims of the applicant. Since the patentee and applicant must both have claims to the same invention, in accordance with pre-AIA 35 U.S.C. 102(g)(1), no interference can be declared.

Jump to MPEP SourceAssignee as Applicant SignatureApplicant and Assignee Filing Under AIAAIA vs Pre-AIA Practice
StatutoryInformativeAlways
[mpep-2303-02-0cddfcf86b7c1e7bc68349d4]
Change to Sole Claim No Longer Directed to Same Invention
Note:
A request for correction under 35 U.S.C. 254 or 255 that changes the sole patent claim so it no longer covers the same invention as any applicant claim prevents an interference from being declared.

Similar to Example 2, a request for correction under 35 U.S.C. 254 or 255, is filed that results in a change to the sole patent claim such that it is no longer directed to the same invention as any claim of the applicant. Again, since the patentee and applicant must both have claims to the same invention, pre-AIA 35 U.S.C. 102(g)(1), no interference can be declared.

Jump to MPEP SourceAssignee as Applicant SignatureApplicant and Assignee Filing Under AIAAIA vs Pre-AIA Practice
StatutoryRequiredAlways
[mpep-2303-02-7e5734bf5f2fad21286bdec9]
Patentee and Applicant Must Have Identical Claims
Note:
No interference can be declared if the patent claim is no longer directed to the same invention as any claim of the applicant.

Similar to Example 2, a request for correction under 35 U.S.C. 254 or 255, is filed that results in a change to the sole patent claim such that it is no longer directed to the same invention as any claim of the applicant. Again, since the patentee and applicant must both have claims to the same invention, pre-AIA 35 U.S.C. 102(g)(1), no interference can be declared.

Jump to MPEP SourceAssignee as Applicant SignatureApplicant and Assignee Filing Under AIAAIA vs Pre-AIA Practice
Topic

Reissue and PTAB Proceedings

3 rules
StatutoryPermittedAlways
[mpep-2303-02-58f8d2e3a49f2d4d17a0f6e7]
Patents Subject to Other Office Proceedings
Note:
Patents undergoing reexamination, reissue, or other actions like late fee petitions and disclaimers must resolve these issues before an interference can be suggested.

Patents that are undergoing reexamination or reissue are subject to the requirement of 37 CFR 41.102 that examination be completed. Patents may, however, be the subject of other proceedings before the Office. For instance, a patent may be the subject of a petition to accept a late maintenance fee in accordance with 35 U.S.C. 41(c), or a request for disclaimer or correction. See pre-AIA 35 U.S.C. 253, 35 U.S.C. 254, 35 U.S.C. 255, and pre-AIA 35 U.S.C. 256. Such issues ordinarily must be resolved before an interference is suggested because they may affect whether or how an interference may be declared. Similarly, any administrative trial ordinarily must be resolved before an interference is suggested.

Jump to MPEP Source · 37 CFR 41.102Reissue and PTAB ProceedingsReissue and ReexaminationPost-Issuance & Maintenance Fees
StatutoryRequiredAlways
[mpep-2303-02-ddff13f7665a0e3551184fee]
Outstanding Issues Must Be Resolved Before Interference Suggestion
Note:
Patent issues such as reissue, maintenance fee petitions, and administrative trials must be resolved before suggesting an interference to ensure proper declaration.

Patents that are undergoing reexamination or reissue are subject to the requirement of 37 CFR 41.102 that examination be completed. Patents may, however, be the subject of other proceedings before the Office. For instance, a patent may be the subject of a petition to accept a late maintenance fee in accordance with 35 U.S.C. 41(c), or a request for disclaimer or correction. See pre-AIA 35 U.S.C. 253, 35 U.S.C. 254, 35 U.S.C. 255, and pre-AIA 35 U.S.C. 256. Such issues ordinarily must be resolved before an interference is suggested because they may affect whether or how an interference may be declared. Similarly, any administrative trial ordinarily must be resolved before an interference is suggested.

Jump to MPEP Source · 37 CFR 41.102Reissue and PTAB ProceedingsReissue and ReexaminationPost-Issuance & Maintenance Fees
StatutoryRequiredAlways
[mpep-2303-02-f5881bc7debe4ae476e13d0b]
Administrative Trial Must Be Resolved Before Interference Suggested
Note:
An administrative trial must be resolved before an interference is suggested as it may affect the declaration of an interference.

Patents that are undergoing reexamination or reissue are subject to the requirement of 37 CFR 41.102 that examination be completed. Patents may, however, be the subject of other proceedings before the Office. For instance, a patent may be the subject of a petition to accept a late maintenance fee in accordance with 35 U.S.C. 41(c), or a request for disclaimer or correction. See pre-AIA 35 U.S.C. 253, 35 U.S.C. 254, 35 U.S.C. 255, and pre-AIA 35 U.S.C. 256. Such issues ordinarily must be resolved before an interference is suggested because they may affect whether or how an interference may be declared. Similarly, any administrative trial ordinarily must be resolved before an interference is suggested.

Jump to MPEP Source · 37 CFR 41.102Reissue and PTAB ProceedingsReissue and ReexaminationPost-Issuance & Maintenance Fees
Topic

Post-Issuance & Maintenance Fees

2 rules
StatutoryPermittedAlways
[mpep-2303-02-f81792ea389b6236da790794]
Petition for Late Maintenance Fee Acceptance
Note:
Patents may be subject to a petition to accept a late maintenance fee in accordance with 35 U.S.C. 41(c).

Patents that are undergoing reexamination or reissue are subject to the requirement of 37 CFR 41.102 that examination be completed. Patents may, however, be the subject of other proceedings before the Office. For instance, a patent may be the subject of a petition to accept a late maintenance fee in accordance with 35 U.S.C. 41(c), or a request for disclaimer or correction. See pre-AIA 35 U.S.C. 253, 35 U.S.C. 254, 35 U.S.C. 255, and pre-AIA 35 U.S.C. 256. Such issues ordinarily must be resolved before an interference is suggested because they may affect whether or how an interference may be declared. Similarly, any administrative trial ordinarily must be resolved before an interference is suggested.

Jump to MPEP Source · 37 CFR 41.102Post-Issuance & Maintenance FeesMaintenance Fee AmountsFee Requirements
StatutoryInformativeAlways
[mpep-2303-02-0d2216b5f24c7d0f0fbae687]
Patent Maintenance Fee Not Timely Paid Results In Expiration
Note:
If a patent maintenance fee is not paid on time, the patent will be considered expired and cannot be used in an interference proceeding.

A patent maintenance fee has not been timely paid. By operation of law, 35 U.S.C. 41(b), the patent is considered to be expired. An interference cannot be declared with an expired patent. See pre-AIA 35 U.S.C. 135(a). Consequently, if a petition to accept delayed payment is not granted in accordance with 37 CFR 1.378, then no interference can be declared.

Jump to MPEP Source · 37 CFR 1.378Post-Issuance & Maintenance FeesMaintenance Fee AmountsFee Requirements
Topic

Reissue and Reexamination

1 rules
StatutoryInformativeAlways
[mpep-2303-02-44e51d61a66ef65775a6ee5d]
Patents Undergoing Reexamination or Reissue Must Complete Examination
Note:
Patents undergoing reexamination or reissue must complete examination as required by 37 CFR 41.102, while other concurrent proceedings may need resolution before an interference can be suggested.

Patents that are undergoing reexamination or reissue are subject to the requirement of 37 CFR 41.102 that examination be completed. Patents may, however, be the subject of other proceedings before the Office. For instance, a patent may be the subject of a petition to accept a late maintenance fee in accordance with 35 U.S.C. 41(c), or a request for disclaimer or correction. See pre-AIA 35 U.S.C. 253, 35 U.S.C. 254, 35 U.S.C. 255, and pre-AIA 35 U.S.C. 256. Such issues ordinarily must be resolved before an interference is suggested because they may affect whether or how an interference may be declared. Similarly, any administrative trial ordinarily must be resolved before an interference is suggested.

Jump to MPEP Source · 37 CFR 41.102Reissue and ReexaminationConcurrent Reissue ProceedingsReissue Patent Practice
Topic

Late Payment and Reinstatement

1 rules
StatutoryInformativeAlways
[mpep-2303-02-a4e0c5b15b532fec97b5e67f]
Expired Patent Cannot Be Interfered With
Note:
If a patent maintenance fee is not timely paid, the patent is considered expired and cannot be involved in an interference proceeding.

A patent maintenance fee has not been timely paid. By operation of law, 35 U.S.C. 41(b), the patent is considered to be expired. An interference cannot be declared with an expired patent. See pre-AIA 35 U.S.C. 135(a). Consequently, if a petition to accept delayed payment is not granted in accordance with 37 CFR 1.378, then no interference can be declared.

Jump to MPEP Source · 37 CFR 1.378Late Payment and ReinstatementPetition to ReinstateUnintentional Delay Standard
Topic

Patent Reinstatement

1 rules
StatutoryProhibitedAlways
[mpep-2303-02-92cdcf3ad66b4596450410d8]
Interference Cannot Be Declared with Expired Patents
Note:
An interference cannot be declared if a patent has expired due to untimely payment of maintenance fees.

A patent maintenance fee has not been timely paid. By operation of law, 35 U.S.C. 41(b), the patent is considered to be expired. An interference cannot be declared with an expired patent. See pre-AIA 35 U.S.C. 135(a). Consequently, if a petition to accept delayed payment is not granted in accordance with 37 CFR 1.378, then no interference can be declared.

Jump to MPEP Source · 37 CFR 1.378Patent ReinstatementLate Payment and ReinstatementPetition to Reinstate
Topic

Petition to Reinstate

1 rules
StatutoryPermittedAlways
[mpep-2303-02-3ef83cd49809581b102373fc]
No Interference If Petition Not Granted for Late Fee
Note:
If a petition to accept delayed payment is not granted in accordance with 37 CFR 1.378, no interference can be declared.

A patent maintenance fee has not been timely paid. By operation of law, 35 U.S.C. 41(b), the patent is considered to be expired. An interference cannot be declared with an expired patent. See pre-AIA 35 U.S.C. 135(a). Consequently, if a petition to accept delayed payment is not granted in accordance with 37 CFR 1.378, then no interference can be declared.

Jump to MPEP Source · 37 CFR 1.378Petition to ReinstateUnintentional Delay StandardPatent Reinstatement
Topic

Pre-AIA 102(f) – Derivation (MPEP 2137)

1 rules
StatutoryInformativeAlways
[mpep-2303-02-98a3e25baeac4159254b405e]
Inventors for Patent and Application Must Be the Same
Note:
Correct inventorship to ensure consistency between the patent and application, eliminating interference based on pre-AIA 102(g)(1).

Inventorship is corrected such that the inventors for the patent and the application are the same. Because pre-AIA 35 U.S.C. 102(g)(1) requires the interference to be with “another inventor,” the correction eliminates the basis for an interference. Other rejections, such as a double-patenting rejection may be appropriate.

Jump to MPEP SourcePre-AIA 102(f) – Derivation (MPEP 2137)AIA vs Pre-AIA 102 (MPEP 2151)Novelty / Prior Art
Topic

AIA vs Pre-AIA 102 (MPEP 2151)

1 rules
StatutoryPermittedAlways
[mpep-2303-02-c636c1458efaaaf13c253cca]
Inventors Must Match for Interference Elimination
Note:
When inventors in a patent and application are corrected to match, it eliminates the basis for an interference under pre-AIA 35 U.S.C. 102(g)(1). Other rejections like double-patenting may still apply.

Inventorship is corrected such that the inventors for the patent and the application are the same. Because pre-AIA 35 U.S.C. 102(g)(1) requires the interference to be with “another inventor,” the correction eliminates the basis for an interference. Other rejections, such as a double-patenting rejection may be appropriate.

Jump to MPEP SourceAIA vs Pre-AIA 102 (MPEP 2151)Novelty / Prior ArtPre-AIA 102(f) – Derivation (MPEP 2137)

Citations

Primary topicCitation
AIA vs Pre-AIA 102 (MPEP 2151)
Assignee as Applicant Signature
Pre-AIA 102(f) – Derivation (MPEP 2137)
35 U.S.C. § 102(g)(1)
Late Payment and Reinstatement
Patent Reinstatement
Petition to Reinstate
Post-Issuance & Maintenance Fees
35 U.S.C. § 135(a)
Assignee as Applicant Signature
Post-Issuance & Maintenance Fees
Reissue and PTAB Proceedings
Reissue and Reexamination
35 U.S.C. § 253
Assignee as Applicant Signature
Post-Issuance & Maintenance Fees
Reissue and PTAB Proceedings
Reissue and Reexamination
35 U.S.C. § 254
Post-Issuance & Maintenance Fees
Reissue and PTAB Proceedings
Reissue and Reexamination
35 U.S.C. § 255
Post-Issuance & Maintenance Fees
Reissue and PTAB Proceedings
Reissue and Reexamination
35 U.S.C. § 256
Late Payment and Reinstatement
Patent Reinstatement
Petition to Reinstate
Post-Issuance & Maintenance Fees
35 U.S.C. § 41(b)
Post-Issuance & Maintenance Fees
Reissue and PTAB Proceedings
Reissue and Reexamination
35 U.S.C. § 41(c)
Late Payment and Reinstatement
Patent Reinstatement
Petition to Reinstate
Post-Issuance & Maintenance Fees
37 CFR § 1.378
Post-Issuance & Maintenance Fees
Reissue and PTAB Proceedings
Reissue and Reexamination
37 CFR § 41.102

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