# MPEP § 1806: Applicants and Inventors > Federal · Agency guidance · In force URL: https://www.frixlaw.com/law-library/statutes/MPEP_S1806 ## Section - **Citation:** MPEP § 1806 - **Heading:** Applicants and Inventors - **Jurisdiction:** Federal - **Kind:** Agency guidance - **Status:** In force - **Text as of:** August 14, 2026 - **Source:** Compiled text - **Location:** USPTO MPEP / Chapter 1800 - Patent Cooperation Treaty / MPEP § 1806 ## Text Any resident or national of a Contracting State may file an international application. See PCT Article 9 and PCT Rule 18 . The applicant can be an individual, corporate entity or other concern. Where there are two or more applicants, at least one of them must be a national or a resident of a Contracting State. The question of whether an applicant is a resident or national of a Contracting State depends on the national law of that State and is decided by the receiving Office. Also, possession of a real and effective industrial or commercial establishment in a Contracting State may be considered residence in that State, and a legal entity constituted according to the national law of a Contracting State is considered a national of that State. Where the inventor is not the applicant, indications concerning the inventor must nevertheless be made in the Request where the national law of at least one of the designated States requires that the name of the inventor be furnished at the time of filing a national application ( PCT Rule 4.1(a)(iv) ). See PCT Applicant’s Guide, International Phase, Annexes B1 and B2, for those States and regional patent systems which require such indications. Furthermore, information concerning the inventor is required by most countries for the national phase. In such a case, the check-box “inventor only” should be marked, the inventor’s name and address indicated in Box No. III, and the inventor’s residence and nationality omitted. I. APPLICANT FOR PURPOSES OF THE UNITED STATES IN INTERNATIONAL APPLICATIONS HAVING AN INTERNATIONAL FILING DATE ON OR AFTER SEPTEMBER 16, 2012 37 CFR 1.421 Applicant for international application. [Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 on or after September 16, 2012] name and address indicated in Box No. III, and the inventor’s residence and nationality omitted. I. APPLICANT FOR PURPOSES OF THE UNITED STATES IN INTERNATIONAL APPLICATIONS HAVING AN INTERNATIONAL FILING DATE ON OR AFTER SEPTEMBER 16, 2012 37 CFR 1.421 Applicant for international application. [Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 on or after September 16, 2012] (a) Only residents or nationals of the United States of America may file international applications in the United States Receiving Office. If an international application does not include an applicant who is indicated as being a resident or national of the United States of America, and at least one applicant: (1) Has indicated a residence or nationality in a PCT Contracting State, or (2) Has no residence or nationality indicated, applicant will be so notified and, if the international application includes a fee amount equivalent to that required by § 1.445(a)(4) , the international application will be forwarded for processing to the International Bureau acting as a Receiving Office (see also § 1.412(c)(6) ). (b) Although the United States Receiving Office will accept international applications filed by any applicant who is a resident or national of the United States of America for international processing, for the purposes of the designation of the United States, an international application will be accepted by the Patent and Trademark Office for the national stage only if the applicant is the inventor or other person as provided in § 1.422 or § 1.424 . Joint inventors must jointly apply for an international application. (c) A registered attorney or agent of the applicant may sign the international application Request and file the international application for the applicant. A separate power of attorney from each applicant may be required. (d) Any indication of different applicants for the purpose of different Designated Offices must be shown on the Request portion of the international application. al application. (c) A registered attorney or agent of the applicant may sign the international application Request and file the international application for the applicant. A separate power of attorney from each applicant may be required. (d) Any indication of different applicants for the purpose of different Designated Offices must be shown on the Request portion of the international application. (e) Requests for changes in the indications concerning the applicant, agent, or common representative of an international application shall be made in accordance with PCT Rule 92bis and may be required to be signed by all applicants. (f) Requests for withdrawals of the international application, designations, priority claims, the Demand, or elections shall be made in accordance with PCT Rule 90bis and must be signed by all applicants. A separate power of attorney from the applicants will be required for the purposes of any request for a withdrawal in accordance with PCT Rule 90bis which is not signed by all applicants. 37 CFR 1.422 Legal representative as applicant in an international application. [Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 on or after September 16, 2012] If an inventor is deceased or under legal incapacity, the legal representative of the inventor may be an applicant in an international application which designates the United States of America. II. APPLICANT FOR PURPOSES OF THE UNITED STATES IN INTERNATIONAL APPLICATIONS HAVING AN INTERNATIONAL FILING DATE BEFORE SEPTEMBER 16, 2012 37 CFR 1.421 (pre-AIA) Applicant for international application. [Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012] be an applicant in an international application which designates the United States of America. II. APPLICANT FOR PURPOSES OF THE UNITED STATES IN INTERNATIONAL APPLICATIONS HAVING AN INTERNATIONAL FILING DATE BEFORE SEPTEMBER 16, 2012 37 CFR 1.421 (pre-AIA) Applicant for international application. [Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012] (a) Only residents or nationals of the United States of America may file international applications in the United States Receiving Office. If an international application does not include an applicant who is indicated as being a resident or national of the United States of America, and at least one applicant: (1) Has indicated a residence or nationality in a PCT Contracting State, or (2) Has no residence or nationality indicated, applicant will be so notified and, if the international application includes a fee amount equivalent to that required by § 1.445(a)(4) , the international application will be forwarded for processing to the International Bureau acting as a Receiving Office (see also § 1.412(c)(6) ). (b) Although the United States Receiving Office will accept international applications filed by any resident or national of the United States of America for international processing, for the purposes of the designation of the United States, an international application must be filed, and will be accepted by the Patent and Trademark Office for the national stage only if filed, by the inventor or as provided in §§ 1.422 or 1.423 . Joint inventors must jointly apply for an international application. (c) For the purposes of designations other than the United States, international applications may be filed by the assignee or owner. (d) A registered attorney or agent of the applicant may sign the international application Request and file the international application for the applicant. A separate power of attorney from each applicant may be required. ntly apply for an international application. (c) For the purposes of designations other than the United States, international applications may be filed by the assignee or owner. (d) A registered attorney or agent of the applicant may sign the international application Request and file the international application for the applicant. A separate power of attorney from each applicant may be required. (e) Any indication of different applicants for the purpose of different Designated Offices must be shown on the Request portion of the international application. (f) Requests for changes in the indications concerning the applicant, agent, or common representative of an international application shall be made in accordance with PCT Rule 92bis and may be required to be signed by all applicants. (g) Requests for withdrawals of the international application, designations, priority claims, the Demand, or elections shall be made in accordance with PCT Rule 90bis and must be signed by all applicants. A separate power of attorney from the applicants will be required for the purposes of any request for a withdrawal in accordance with PCT Rule 90bis which is not signed by all applicants. The submission of a separate power of attorney may be excused upon the request of another applicant where one or more inventors cannot be found or reached after diligent effort. Such a request must be accompanied by a statement explaining to the satisfaction of the Director the lack of the signature concerned. 37 CFR 1.422 (pre-AIA) When the inventor is dead. [Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012] In case of the death of the inventor, the legal representative (executor, administrator, etc.) of the deceased inventor may file an international application which designates the United States of America. 37 CFR 1.423 (pre-AIA) When the inventor is insane or legally incapacitated. [Editor Note: Applicable to patent applications filed under 35 U.S.C ed under 35 U.S.C. 363 before September 16, 2012] In case of the death of the inventor, the legal representative (executor, administrator, etc.) of the deceased inventor may file an international application which designates the United States of America. 37 CFR 1.423 (pre-AIA) When the inventor is insane or legally incapacitated. [Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012] In case an inventor is insane or otherwise legally incapacitated, the legal representative (guardian, conservator, etc.) of such inventor may file an international application which designates the United States of America. For international applications having international filing dates before September 16, 2012, only inventors (and legal representatives of deceased or legally incapacitated inventors) can be applicants for purposes of the designation of the United States. Therefore, for the purpose of entering the national stage in the United States of America, the inventor(s) must be indicated in the PCT Request as “applicant and inventor” for at least the United States. A legal representative of a deceased inventor may be indicated in the international application as an applicant for the purposes of the United States. In such a case, the indication in the Request (in Box II or III, as appropriate) for the legal representative should be made as follows: SMITH, Alfred, legal representative of JONES, Bernard (deceased), followed by indications of the address, nationality and residence of the legal representative. The legal representative should be indicated as an “applicant only” except where the legal representative is also an inventor, in which case the legal representative should be indicated as an “applicant and inventor.” The name of the deceased inventor should also appear in a separate box (in Box III) with the indication of “deceased” (e.g., “JONES, Bernard (deceased))” and identified as an “inventor only” and not as an applicant. [top] ## Nearby sections - [MPEP § 1801 Basic Patent Cooperation Treaty (PCT) Principles](https://www.frixlaw.com/law-library/statutes/MPEP_S1801.md) - [MPEP § 1802 PCT Definitions](https://www.frixlaw.com/law-library/statutes/MPEP_S1802.md) - [MPEP § 1803 Reservations Under the PCT Taken by, and Notifications of Incompatibility Made by, the United States of America](https://www.frixlaw.com/law-library/statutes/MPEP_S1803.md) - [MPEP § 1804 [Reserved]](https://www.frixlaw.com/law-library/statutes/MPEP_S1804.md) - [MPEP § 1805 Where To File an International Application](https://www.frixlaw.com/law-library/statutes/MPEP_S1805.md) - [MPEP § 1806 Applicants and Inventors](https://www.frixlaw.com/law-library/statutes/MPEP_S1806.md) - [MPEP § 1807 Agent or Common Representative and General Power of Attorney](https://www.frixlaw.com/law-library/statutes/MPEP_S1807.md) - [MPEP § 1808 Change in or Revocation of the Appointment of an Agent or a Common Representative](https://www.frixlaw.com/law-library/statutes/MPEP_S1808.md) - [MPEP § 1809 Access to the USPTO patent electronic filing system](https://www.frixlaw.com/law-library/statutes/MPEP_S1809.md) - [MPEP § 1810 Filing Date Requirements](https://www.frixlaw.com/law-library/statutes/MPEP_S1810.md) - [MPEP § 1811 [Reserved]](https://www.frixlaw.com/law-library/statutes/MPEP_S1811.md) - [MPEP § 1812 Elements of the International Application](https://www.frixlaw.com/law-library/statutes/MPEP_S1812.md) - [MPEP § 1817 PCT Member States](https://www.frixlaw.com/law-library/statutes/MPEP_S1817.md) - [MPEP § 1818 [Reserved]](https://www.frixlaw.com/law-library/statutes/MPEP_S1818.md) --- Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/MPEP_S1806. Check the current official text before relying on it. Not legal advice.