MPEP § 2304.02(a) — Identifying the Other Application or Patent (Annotated Rules)

§2304.02(a) Identifying the Other Application or Patent

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

This page consolidates and annotates all enforceable requirements under MPEP § 2304.02(a), 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.

Identifying the Other Application or Patent

This section addresses Identifying the Other Application or Patent. Primary authority: 37 CFR 41.202. Contains: 1 requirement, 1 guidance statement, 1 permission, and 1 other statement.

Key Rules

Topic

Declaration of Interference

5 rules
StatutoryInformativeAlways
[mpep-2304-02-a-8cb485429b55a465d4c71586]
Identification Requirement for Interference
Note:
An applicant must provide the application serial number or patent number of the other application or patent when seeking an interference.

Usually an applicant seeking an interference will know the application serial number or the patent number of the application or patent, respectively, with which it seeks an interference. If so, providing that number will fully meet the identification requirement of 37 CFR 41.202(a)(1).

Jump to MPEP Source · 37 CFR 41.202(a)(1)Declaration of InterferenceInterference Proceedings (Pre-AIA)
StatutoryInformativeAlways
[mpep-2304-02-a-8def15b7ac06c0fa3fe6a2b6]
Application Serial Number Required for Interference
Note:
An applicant must provide the application serial number to meet the identification requirement for an interference.

Usually an applicant seeking an interference will know the application serial number or the patent number of the application or patent, respectively, with which it seeks an interference. If so, providing that number will fully meet the identification requirement of 37 CFR 41.202(a)(1).

Jump to MPEP Source · 37 CFR 41.202(a)(1)Declaration of InterferenceInterference Proceedings (Pre-AIA)
StatutoryInformativeAlways
[mpep-2304-02-a-c3d2d924d5ee5c7d8064e5d5]
Identify Likely Interfering Application Based on Indirect Evidence
Note:
An applicant must identify a likely interfering application using indirect evidence like journal articles, 'patent pending' notices, or foreign published applications and provide information about inventors and assignees to assist the examiner.

Occasionally, an applicant will believe another interfering application exists based only on indirect evidence, for instance through a journal article, a “patent pending” notice, or a foreign published application. In such cases, information about likely named inventors and likely assignees may lead to the right application. The applicant should be motivated to help the examiner identify the application since inadequate information may prevent the declaration of the suggested interference.

Jump to MPEP Source · 37 CFR 41.202Declaration of InterferenceInterference Proceedings (Pre-AIA)
StatutoryPermittedAlways
[mpep-2304-02-a-8f3fb6e9b1b4167fec65c48a]
Identify Likely Named Inventors and Assignees for Interference Declaration
Note:
The applicant should provide information about likely named inventors and assignees to help the examiner identify the correct interfering application.

Occasionally, an applicant will believe another interfering application exists based only on indirect evidence, for instance through a journal article, a “patent pending” notice, or a foreign published application. In such cases, information about likely named inventors and likely assignees may lead to the right application. The applicant should be motivated to help the examiner identify the application since inadequate information may prevent the declaration of the suggested interference.

Jump to MPEP Source · 37 CFR 41.202Declaration of InterferenceInterference Proceedings (Pre-AIA)
StatutoryRecommendedAlways
[mpep-2304-02-a-04c3f54832cf2cf41bfc3528]
Applicant Must Help Examiner Identify Interfering Application
Note:
The applicant is required to assist the examiner in identifying the interfering application, as insufficient information may prevent declaring an interference.

Occasionally, an applicant will believe another interfering application exists based only on indirect evidence, for instance through a journal article, a “patent pending” notice, or a foreign published application. In such cases, information about likely named inventors and likely assignees may lead to the right application. The applicant should be motivated to help the examiner identify the application since inadequate information may prevent the declaration of the suggested interference.

Jump to MPEP Source · 37 CFR 41.202Declaration of InterferenceInterference Proceedings (Pre-AIA)
Topic

Reissue Patent Practice

1 rules
StatutoryRequiredAlways
[mpep-2304-02-a-75a6017c24e308f402ab45ef]
Applicant Must Identify Patent or Application for Interference
Note:
An applicant must provide sufficient information to identify the specific patent or application they wish to suggest an interference with.
(a) Applicant. An applicant, including a reissue applicant, may suggest an interference with another application or a patent. The suggestion must:
  • (1) Provide sufficient information to identify the application or patent with which the applicant seeks an interference,
Jump to MPEP Source · 37 CFR 41.202Reissue Patent PracticeDeclaration of InterferenceInterference Proceedings (Pre-AIA)

Citations

Primary topicCitation
Declaration of Interference37 CFR § 41.202(a)(1)

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