MPEP § 302.03 — Identifying Patent or Application (Annotated Rules)

§302.03 Identifying Patent or Application

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

This page consolidates and annotates all enforceable requirements under MPEP § 302.03, 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 Patent or Application

This section addresses Identifying Patent or Application. Primary authority: 37 CFR 1.53(b), 37 CFR 1.53(c), and 37 CFR 3.21. Contains: 7 requirements.

Key Rules

Topic

Title Format Requirements

3 rules
StatutoryRequiredAlways
[mpep-302-03-ffbc09b77b3d2a81242778d3]
Patent Assignment Must Identify Patent Number
Note:
An assignment of a patent must specify the patent by its number to ensure clarity.

An assignment relating to a patent must identify the patent by the patent number. An assignment relating to a national patent application must identify the national patent application by the application number (consisting of the series code and the serial number; e.g., 07/123,456). An assignment relating to an international patent application which designates the United States of America must identify the international application by the international application number; e.g., PCT/US2012/012345. An assignment relating to an international design application which designates the United States of America must identify the international design application by the international registration number or by the U.S. application number assigned to the international design application. If an assignment of a patent application filed under § 1.53(b) of this chapter is executed concurrently with, or subsequent to, the execution of the patent application, but before the patent application is filed, it must identify the patent application by the name of each inventor and the title of the invention so that there can be no mistake as to the patent application intended. If an assignment of a provisional application under § 1.53(c) of this chapter is executed before the provisional application is filed, it must identify the provisional application by the name of each inventor and the title of the invention so that there can be no mistake as to the provisional application intended.

Jump to MPEP Source · 37 CFR 1.53(b)Title Format RequirementsProvisional Application RequirementsDesign Title Requirements
StatutoryRequiredAlways
[mpep-302-03-79c02eef7c3acdb0a900ec71]
Assignment Must Identify Patent Application by Inventors and Title
Note:
An assignment of a patent application filed under §1.53(b) must identify the application by listing all inventors and the invention’s title to avoid ambiguity.

An assignment relating to a patent must identify the patent by the patent number. An assignment relating to a national patent application must identify the national patent application by the application number (consisting of the series code and the serial number; e.g., 07/123,456). An assignment relating to an international patent application which designates the United States of America must identify the international application by the international application number; e.g., PCT/US2012/012345. An assignment relating to an international design application which designates the United States of America must identify the international design application by the international registration number or by the U.S. application number assigned to the international design application. If an assignment of a patent application filed under § 1.53(b) of this chapter is executed concurrently with, or subsequent to, the execution of the patent application, but before the patent application is filed, it must identify the patent application by the name of each inventor and the title of the invention so that there can be no mistake as to the patent application intended. If an assignment of a provisional application under § 1.53(c) of this chapter is executed before the provisional application is filed, it must identify the provisional application by the name of each inventor and the title of the invention so that there can be no mistake as to the provisional application intended.

Jump to MPEP Source · 37 CFR 1.53(b)Title Format RequirementsDesign Title RequirementsInventorship for International Designs
StatutoryRequiredAlways
[mpep-302-03-b5fa838b7463b394fbba095f]
Assignment of Provisional Application Before Filing Must Identify Inventors and Title
Note:
An assignment of a provisional application executed before filing must specify the inventors' names and the invention's title to avoid ambiguity.

An assignment relating to a patent must identify the patent by the patent number. An assignment relating to a national patent application must identify the national patent application by the application number (consisting of the series code and the serial number; e.g., 07/123,456). An assignment relating to an international patent application which designates the United States of America must identify the international application by the international application number; e.g., PCT/US2012/012345. An assignment relating to an international design application which designates the United States of America must identify the international design application by the international registration number or by the U.S. application number assigned to the international design application. If an assignment of a patent application filed under § 1.53(b) of this chapter is executed concurrently with, or subsequent to, the execution of the patent application, but before the patent application is filed, it must identify the patent application by the name of each inventor and the title of the invention so that there can be no mistake as to the patent application intended. If an assignment of a provisional application under § 1.53(c) of this chapter is executed before the provisional application is filed, it must identify the provisional application by the name of each inventor and the title of the invention so that there can be no mistake as to the provisional application intended.

Jump to MPEP Source · 37 CFR 1.53(b)Title Format RequirementsProvisional Application RequirementsDesign Title Requirements
Topic

Identifying Application/Patent in Assignment (37 CFR 3.21)

2 rules
StatutoryRequiredAlways
[mpep-302-03-bac55e9294cf859dbad5bbb1]
Inventors and Title Required for Application Assignment
Note:
The application must be identified by the inventors' names and the invention's title when assigning rights to it.

The patent or patent application to which an assignment relates must be identified by patent number or application number unless the assignment is executed concurrently with or subsequent to the execution of the application but before the application is filed. Then, the application must be identified by the name(s) of the inventors, and the title of the invention. If an assignment of a provisional application is executed before the provisional application is filed, it must identify the provisional application by name(s) of the inventors and the title of the invention.

Jump to MPEP Source · 37 CFR 3.21Identifying Application/Patent in Assignment (37 CFR 3.21)Recording of Assignments (MPEP 302-303)Assignment and Ownership (MPEP Chapter 300)
StatutoryRequiredAlways
[mpep-302-03-3f7cb2715b94ddf641262b20]
Provisional Application Identification Required Before Filing
Note:
An assignment of a provisional application executed before filing must identify the application by inventors' names and the invention's title.

The patent or patent application to which an assignment relates must be identified by patent number or application number unless the assignment is executed concurrently with or subsequent to the execution of the application but before the application is filed. Then, the application must be identified by the name(s) of the inventors, and the title of the invention. If an assignment of a provisional application is executed before the provisional application is filed, it must identify the provisional application by name(s) of the inventors and the title of the invention.

Jump to MPEP Source · 37 CFR 3.21Identifying Application/Patent in Assignment (37 CFR 3.21)Recording of Assignments (MPEP 302-303)Assignment and Ownership (MPEP Chapter 300)
Topic

Nationals and Residents

1 rules
StatutoryRequiredAlways
[mpep-302-03-050396b9bc7c5ddf2c3b7c08]
Assignment Must Identify National Patent Application By Number
Note:
An assignment relating to a national patent application must specify the application by its number, which includes the series code and serial number.

An assignment relating to a patent must identify the patent by the patent number. An assignment relating to a national patent application must identify the national patent application by the application number (consisting of the series code and the serial number; e.g., 07/123,456). An assignment relating to an international patent application which designates the United States of America must identify the international application by the international application number; e.g., PCT/US2012/012345. An assignment relating to an international design application which designates the United States of America must identify the international design application by the international registration number or by the U.S. application number assigned to the international design application. If an assignment of a patent application filed under § 1.53(b) of this chapter is executed concurrently with, or subsequent to, the execution of the patent application, but before the patent application is filed, it must identify the patent application by the name of each inventor and the title of the invention so that there can be no mistake as to the patent application intended. If an assignment of a provisional application under § 1.53(c) of this chapter is executed before the provisional application is filed, it must identify the provisional application by the name of each inventor and the title of the invention so that there can be no mistake as to the provisional application intended.

Jump to MPEP Source · 37 CFR 1.53(b)Nationals and ResidentsReceiving Office (RO/US)International Design Application Requirements
Topic

Designation of United States

1 rules
StatutoryRequiredAlways
[mpep-302-03-191f8e41c9ab132649b4f850]
International Patent Application Must Identify by PCT Number
Note:
An assignment relating to an international patent application designating the USA must identify it using the PCT number, e.g., PCT/US2012/012345.

An assignment relating to a patent must identify the patent by the patent number. An assignment relating to a national patent application must identify the national patent application by the application number (consisting of the series code and the serial number; e.g., 07/123,456). An assignment relating to an international patent application which designates the United States of America must identify the international application by the international application number; e.g., PCT/US2012/012345. An assignment relating to an international design application which designates the United States of America must identify the international design application by the international registration number or by the U.S. application number assigned to the international design application. If an assignment of a patent application filed under § 1.53(b) of this chapter is executed concurrently with, or subsequent to, the execution of the patent application, but before the patent application is filed, it must identify the patent application by the name of each inventor and the title of the invention so that there can be no mistake as to the patent application intended. If an assignment of a provisional application under § 1.53(c) of this chapter is executed before the provisional application is filed, it must identify the provisional application by the name of each inventor and the title of the invention so that there can be no mistake as to the provisional application intended.

Jump to MPEP Source · 37 CFR 1.53(b)Designation of United StatesNationals and ResidentsPCT International Applications
Topic

Hague Definitions

1 rules
StatutoryRequiredAlways
[mpep-302-03-926f6bb32f96cc141fb5ed3e]
Identification Requirement for International Design Applications
Note:
An assignment of an international design application that designates the USA must identify it by its registration number or U.S. application number.

An assignment relating to a patent must identify the patent by the patent number. An assignment relating to a national patent application must identify the national patent application by the application number (consisting of the series code and the serial number; e.g., 07/123,456). An assignment relating to an international patent application which designates the United States of America must identify the international application by the international application number; e.g., PCT/US2012/012345. An assignment relating to an international design application which designates the United States of America must identify the international design application by the international registration number or by the U.S. application number assigned to the international design application. If an assignment of a patent application filed under § 1.53(b) of this chapter is executed concurrently with, or subsequent to, the execution of the patent application, but before the patent application is filed, it must identify the patent application by the name of each inventor and the title of the invention so that there can be no mistake as to the patent application intended. If an assignment of a provisional application under § 1.53(c) of this chapter is executed before the provisional application is filed, it must identify the provisional application by the name of each inventor and the title of the invention so that there can be no mistake as to the provisional application intended.

Jump to MPEP Source · 37 CFR 1.53(b)Hague DefinitionsDesignation of United StatesNationals and Residents
Topic

Identification by Number

1 rules
StatutoryRequiredAlways
[mpep-302-03-b1b2b598fe54128d2d1baf88]
Assignment Must Identify Patent or Application by Number
Note:
The assignment must identify the related patent or application using its number unless it is executed after the application's filing but before the application is officially filed.

The patent or patent application to which an assignment relates must be identified by patent number or application number unless the assignment is executed concurrently with or subsequent to the execution of the application but before the application is filed. Then, the application must be identified by the name(s) of the inventors, and the title of the invention. If an assignment of a provisional application is executed before the provisional application is filed, it must identify the provisional application by name(s) of the inventors and the title of the invention.

Jump to MPEP Source · 37 CFR 3.21Identification by NumberIdentifying Application/Patent in Assignment (37 CFR 3.21)Recording of Assignments (MPEP 302-303)

Citations

Primary topicCitation
Designation of United States
Hague Definitions
Nationals and Residents
Title Format Requirements
37 CFR § 1.53(b)
Designation of United States
Hague Definitions
Nationals and Residents
Title Format Requirements
37 CFR § 1.53(c)

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