MPEP § 2139.01 — Effective Filing Date of a Claimed Invention Under Pre-AIA 35 U.S.C. 102 (Annotated Rules)

§2139.01 Effective Filing Date of a Claimed Invention Under Pre-AIA 35 U.S.C. 102

USPTO MPEP version: BlueIron's Update: 2026-01-10

This page consolidates and annotates all enforceable requirements under MPEP § 2139.01, 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.

Effective Filing Date of a Claimed Invention Under Pre-AIA 35 U.S.C. 102

This section addresses Effective Filing Date of a Claimed Invention Under Pre-AIA 35 U.S.C. 102. Primary authority: 35 U.S.C. 102, 35 U.S.C. 371, and 35 U.S.C. 363. Contains: 1 permission and 6 other statements.

Key Rules

Topic

Determining Whether Application Is AIA or Pre-AIA

6 rules
StatutoryInformativeAlways
[mpep-2139-01-848028d952786440a1a3ae15]
Effective Filing Date for Pre-AIA Claims
Note:
Determine the effective filing date of a claimed invention based on the actual U.S. application filing date, unless certain conditions apply.
In examining applications subject to pre-AIA 35 U.S.C. 102, the effective filing date of the claimed invention is the actual filing date of the U.S. application, unless situation (A), (B), or (C) as set forth below applies. Note that the actual U.S. filing date of an application that entered the national stage under 35 U.S.C. 371 is the international filing date. See 35 U.S.C. 363 and MPEP § 1893.03(b).
  • (A) If the application is a continuation or divisional of one or more earlier U.S. applications or international applications and if the requirements of 35 U.S.C. 120 or 365(c) have been satisfied, the effective filing date of the claimed invention is the same as the earliest filing date in the line of continuation or divisional applications.
  • (B) If the application is a continuation-in-part of an earlier U.S. application or international application, any claims in the new application not supported by the specification and claims of the parent application have an effective filing date equal to the actual filing date of the new application. Any claims which are fully supported under 35 U.S.C. 112 by the earlier parent application have the effective filing date of that earlier parent application.
  • (C) If the application properly claims benefit under 35 U.S.C. 119(e) to a provisional application, the effective filing date of the claimed invention is the filing date of the provisional application for any claims which are fully supported under the first paragraph of 35 U.S.C. 112 by the provisional application.
Jump to MPEP SourceDetermining Whether Application Is AIA or Pre-AIAInternational Filing DateNationals and Residents
StatutoryInformativeAlways
[mpep-2139-01-7c70bfaffb367d18e2670878]
Continuation/Divisional Application Effective Filing Date
Note:
If an application is a continuation or divisional of earlier U.S. or international applications and the requirements are met, its effective filing date matches the earliest filing date in the line of continuation or divisional applications.

In examining applications subject to pre-AIA 35 U.S.C. 102, the effective filing date of the claimed invention is the actual filing date of the U.S. application, unless situation (A), (B), or (C) as set forth below applies. Note that the actual U.S. filing date of an application that entered the national stage under 35 U.S.C. 371 is the international filing date. See 35 U.S.C. 363 and MPEP § 1893.03(b). (A) If the application is a continuation or divisional of one or more earlier U.S. applications or international applications and if the requirements of 35 U.S.C. 120 or 365(c) have been satisfied, the effective filing date of the claimed invention is the same as the earliest filing date in the line of continuation or divisional applications.

Jump to MPEP SourceDetermining Whether Application Is AIA or Pre-AIAInternational Filing DateNational Stage Entry Requirements
StatutoryInformativeAlways
[mpep-2139-01-b940518be465f5de8ba275ec]
Claims Not Supported Have New Filing Date
Note:
If a new application contains claims not supported by the parent application, these claims have an effective filing date equal to the actual filing date of the new application.

In examining applications subject to pre-AIA 35 U.S.C. 102, the effective filing date of the claimed invention is the actual filing date of the U.S. application, unless situation (A), (B), or (C) as set forth below applies. Note that the actual U.S. filing date of an application that entered the national stage under 35 U.S.C. 371 is the international filing date. See 35 U.S.C. 363 and MPEP § 1893.03(b).

(B) If the application is a continuation-in-part of an earlier U.S. application or international application, any claims in the new application not supported by the specification and claims of the parent application have an effective filing date equal to the actual filing date of the new application.

Jump to MPEP SourceDetermining Whether Application Is AIA or Pre-AIAArticle 19 Amendment ScopeInternational Filing Date
StatutoryInformativeAlways
[mpep-2139-01-0e06d45af40be94d70787c86]
Claims Supported by Earlier Application Have Its Filing Date
Note:
Claims fully supported under 35 U.S.C. 112 by an earlier parent application have the effective filing date of that parent application.

In examining applications subject to pre-AIA 35 U.S.C. 102, the effective filing date of the claimed invention is the actual filing date of the U.S. application, unless situation (A), (B), or (C) as set forth below applies. Note that the actual U.S. filing date of an application that entered the national stage under 35 U.S.C. 371 is the international filing date. See 35 U.S.C. 363 and MPEP § 1893.03(b).

Any claims which are fully supported under 35 U.S.C. 112 by the earlier parent application have the effective filing date of that earlier parent application.

Jump to MPEP SourceDetermining Whether Application Is AIA or Pre-AIAArticle 19 Amendment ScopeInternational Filing Date
StatutoryInformativeAlways
[mpep-2139-01-443f95d4091088b8f38070e6]
Proper Provisional Application Claim Extends Effective Filing Date
Note:
If an application properly claims benefit under 35 U.S.C. 119(e) to a provisional application, the effective filing date for supported claims is that of the provisional application.

In examining applications subject to pre-AIA 35 U.S.C. 102, the effective filing date of the claimed invention is the actual filing date of the U.S. application, unless situation (A), (B), or (C) as set forth below applies. Note that the actual U.S. filing date of an application that entered the national stage under 35 U.S.C. 371 is the international filing date. See 35 U.S.C. 363 and MPEP § 1893.03(b).

(C) If the application properly claims benefit under 35 U.S.C. 119(e) to a provisional application, the effective filing date of the claimed invention is the filing date of the provisional application for any claims which are fully supported under the first paragraph of 35 U.S.C. 112 by the provisional application.

Jump to MPEP SourceDetermining Whether Application Is AIA or Pre-AIAArticle 19 Amendment ScopeInternational Filing Date
StatutoryPermittedAlways
[mpep-2139-01-8bf1d92c2561eb48f3385e9d]
Foreign Priority Does Not Determine Effective Filing Date for Pre-AIA Claims
Note:
The effective filing date for pre-AIA claims is not based on the foreign priority document's filing date, but it can be used to overcome certain references.

The effective filing date for claims subject to pre-AIA 35 U.S.C. 102 is not the filing date of the foreign priority document, although the filing date of the foreign priority document may be used to overcome certain references. See MPEP § 2136.05 et seq.

Jump to MPEP SourceDetermining Whether Application Is AIA or Pre-AIAForeign Priority Affecting Effective DateDetermining AIA vs Pre-AIA Applicability (MPEP 2159)
Topic

Article 19 Amendment Scope

1 rules
StatutoryInformativeAlways
[mpep-2139-01-481189af7bd0f3507c2426fe]
Requirement for Benefit Claims Under U.S. Filing Rules
Note:
The rule outlines the requirements for claiming benefits under 35 U.S.C. 119(e), 120, or 365(c) in an application that enters the national stage under 35 U.S.C. 371.

See MPEP § 1893.03(c), subsection III for benefit claims under 35 U.S.C. 119(e), 120, or 365(c) in an application that entered the national stage under 35 U.S.C. 371. See MPEP §§ 211.01(c) and 1895 for additional information on determining the effective filing dates of claimed inventions in a continuation, divisional, or continuation-in-part of a PCT application designating the U.S. See also MPEP §§ 1895.01 and 1896 which discuss differences between applications filed under 35 U.S.C. 111(a) and international applications that enter national stage under 35 U.S.C. 371.

Jump to MPEP SourceArticle 19 Amendment ScopeNationals and ResidentsReceiving Office (RO/US)

Citations

Primary topicCitation
Determining Whether Application Is AIA or Pre-AIA35 U.S.C. § 102
Article 19 Amendment Scope35 U.S.C. § 111(a)
Determining Whether Application Is AIA or Pre-AIA35 U.S.C. § 112
Article 19 Amendment Scope
Determining Whether Application Is AIA or Pre-AIA
35 U.S.C. § 119(e)
Determining Whether Application Is AIA or Pre-AIA35 U.S.C. § 120
Determining Whether Application Is AIA or Pre-AIA35 U.S.C. § 363
Article 19 Amendment Scope
Determining Whether Application Is AIA or Pre-AIA
35 U.S.C. § 371
Determining Whether Application Is AIA or Pre-AIAMPEP § 1893.03(b)
Article 19 Amendment ScopeMPEP § 1893.03(c)
Article 19 Amendment ScopeMPEP § 1895.01
Article 19 Amendment ScopeMPEP § 211.01(c)
Determining Whether Application Is AIA or Pre-AIAMPEP § 2136.05

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: 2026-01-10