MPEP § 1893 — National Stage (U.S. National Application Filed Under 35 U.S.C. 371) (Annotated Rules)

§1893 National Stage (U.S. National Application Filed Under 35 U.S.C. 371)

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

This page consolidates and annotates all enforceable requirements under MPEP § 1893, 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.

National Stage (U.S. National Application Filed Under 35 U.S.C. 371)

This section addresses National Stage (U.S. National Application Filed Under 35 U.S.C. 371). Primary authority: 35 U.S.C. 371, 35 U.S.C. 111(a), and 35 U.S.C. 111(b). Contains: 1 requirement, 1 guidance statement, and 4 other statements.

Key Rules

Topic

Amendments in National Stage

2 rules
StatutoryInformativeAlways
[mpep-1893-1f3260642a49d6bd258daf85]
National Stage Application Timing and Art Status
Note:
The national stage application can be submitted up to 30 months after the priority date, with prior art status known before submission.
The time delay is, however, the benefit most often recognized as primary. Ultimately, applicant might choose to submit the national stage application. The national stage is unique compared to a domestic national application in that:
  • (A) it is submitted later (i.e., normally 30 months from a claimed priority date as compared to 12 months for a domestic application claiming priority); and
  • (B) the status of the prior art is generally known before the national stage begins and this is not necessarily so in a domestic national application.
Jump to MPEP SourceAmendments in National StageNational Stage EntryNational Stage Examination
StatutoryInformativeAlways
[mpep-1893-ff5becc88bd61154c442e557]
Prior Art Known Before National Stage Begins
Note:
The status of prior art is generally known before the national stage begins, but not necessarily in a domestic national application.

The time delay is, however, the benefit most often recognized as primary. Ultimately, applicant might choose to submit the national stage application. The national stage is unique compared to a domestic national application in that:

(B) the status of the prior art is generally known before the national stage begins and this is not necessarily so in a domestic national application.

Jump to MPEP SourceAmendments in National StageSearch in National StageNational Stage Examination
Topic

Nationals and Residents

2 rules
StatutoryRecommendedAlways
[mpep-1893-0b6bc0ea20307cb77492d686]
Use U.S. Application Number for National Stage Communications
Note:
When dealing with a national stage application, always use the assigned U.S. application number for all communications with the USPTO to ensure processing is expedited.

Once an international application entering the U.S. national phase (“national stage application”) has been accorded a U.S. application number (the two digit series code followed by a six digit serial number), that number should be used whenever papers or other communications are directed to the USPTO regarding the national stage application. See 37 CFR 1.5(a). The national stage application is tracked through the Patent Data Portal system by the eight digit U.S. application number. Therefore, processing is expedited if the U.S. application number is indicated. The international application number, international filing date, and the national stage entry date under 35 U.S.C. 371 (if such has been accorded) should also be included, as such would also be helpful for identification purposes and can be used to cross-check a possibly erroneous U.S. application number.

Jump to MPEP Source · 37 CFR 1.5(a)Nationals and ResidentsReceiving Office (RO/US)Amendments in National Stage
StatutoryInformativeAlways
[mpep-1893-c220de4295242e5ab69633fd]
U.S. Application Number Required for National Stage Processing
Note:
The U.S. application number is necessary to track and expedite the processing of national stage applications through the Patent Data Portal system.

Once an international application entering the U.S. national phase (“national stage application”) has been accorded a U.S. application number (the two digit series code followed by a six digit serial number), that number should be used whenever papers or other communications are directed to the USPTO regarding the national stage application. See 37 CFR 1.5(a). The national stage application is tracked through the Patent Data Portal system by the eight digit U.S. application number. Therefore, processing is expedited if the U.S. application number is indicated. The international application number, international filing date, and the national stage entry date under 35 U.S.C. 371 (if such has been accorded) should also be included, as such would also be helpful for identification purposes and can be used to cross-check a possibly erroneous U.S. application number.

Jump to MPEP Source · 37 CFR 1.5(a)Nationals and ResidentsReceiving Office (RO/US)Amendments in National Stage
Topic

Hague Definitions

1 rules
StatutoryInformativeAlways
[mpep-1893-845ca29cdb85bf32be54ba77]
Four Types of U.S. National Applications Defined
Note:
This rule defines the four types of national applications in the United States, including national stage applications, regular domestic applications, provisional applications, and international design applications.

There are four types of U.S. national applications: a national stage application under 35 U.S.C. 371, a regular domestic national application filed under 35 U.S.C. 111(a), a provisional application filed under 35 U.S.C. 111(b), and an international design application filed under the Hague Agreement in which the Office has received a copy of the international registration pursuant to Hague Agreement Article 10. See 37 CFR 1.9.

Jump to MPEP Source · 37 CFR 1.9Hague DefinitionsNational Stage Entry RequirementsAmendments in National Stage
Topic

Effect of International Filing

1 rules
StatutoryRequiredAlways
[mpep-1893-ced26827617c7c52f56143ac]
Benefits of Using Patent Cooperation Treaty
Note:
An applicant gains delays in submission, international search, and examination fees, as well as additional time for research and evaluation before filing a U.S. national application under 35 U.S.C. 371.
An applicant who uses the Patent Cooperation Treaty gains the benefit of:
  • (A) a delay in the time when papers must be submitted to the national offices;
  • (B) an international search (to judge the level of the relevant prior art) and a written opinion on the question of whether the claimed invention appears to be novel, to involve an inventive step (to be non-obvious), and to be industrially applicable before having to expend resources for filing fees, translations and other costs;
  • (C) a delay in the expenditure of fees;
  • (D) additional time for research;
  • (E) additional time to evaluate financial, marketing, commercial and other considerations; and
  • (F) the option of obtaining international preliminary examination.
Jump to MPEP SourceEffect of International FilingAmendments in National StageNational Stage Examination
Topic

International Filing Date

1 rules
StatutoryRecommendedAlways
[mpep-1893-298598db6c2016778010c44e]
Include International Filing Date for National Stage Applications
Note:
When entering the U.S. national phase, include the international application number, filing date, and entry date to ensure proper identification and cross-checking of the U.S. application number.

Once an international application entering the U.S. national phase (“national stage application”) has been accorded a U.S. application number (the two digit series code followed by a six digit serial number), that number should be used whenever papers or other communications are directed to the USPTO regarding the national stage application. See 37 CFR 1.5(a). The national stage application is tracked through the Patent Data Portal system by the eight digit U.S. application number. Therefore, processing is expedited if the U.S. application number is indicated. The international application number, international filing date, and the national stage entry date under 35 U.S.C. 371 (if such has been accorded) should also be included, as such would also be helpful for identification purposes and can be used to cross-check a possibly erroneous U.S. application number.

Jump to MPEP Source · 37 CFR 1.5(a)International Filing DateNationals and ResidentsReceiving Office (RO/US)

Citations

Primary topicCitation
Hague Definitions35 U.S.C. § 111(a)
Hague Definitions35 U.S.C. § 111(b)
Hague Definitions
International Filing Date
Nationals and Residents
35 U.S.C. § 371
International Filing Date
Nationals and Residents
37 CFR § 1.5(a)
Hague Definitions37 CFR § 1.9

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