MPEP § 1806 — Applicants and Inventors (Annotated Rules)

§1806 Applicants and Inventors

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

This page consolidates and annotates all enforceable requirements under MPEP § 1806, 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.

Applicants and Inventors

This section addresses Applicants and Inventors. Primary authority: 35 U.S.C. 363, 37 CFR 1.421, and 37 CFR 1.422. Contains: 13 requirements, 1 prohibition, 3 guidance statements, 6 permissions, and 3 other statements.

Key Rules

Topic

Nationals and Residents

9 rules
StatutoryPermittedAlways
[mpep-1806-0f0641584333ed0bb32d00f1]
National or Resident of Contracting State Can File International Application
Note:
An individual, corporate entity, or other concern who is a national or resident of a Contracting State may file an international application. At least one applicant must be from a Contracting State.

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.

Jump to MPEP SourceNationals and ResidentsReceiving Office (RO/US)PCT International Application Filing
StatutoryPermittedAlways
[mpep-1806-fddd89abfd0d68b0f5297d33]
Applicant Can Be Individual, Corporate Entity Or Other Concern
Note:
An applicant for an international application under the PCT can be any individual, corporate entity, or other concern. At least one of multiple applicants must be a national or resident of a Contracting State.

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.

Jump to MPEP SourceNationals and ResidentsReceiving Office (RO/US)PCT International Application Filing
StatutoryRequiredAlways
[mpep-1806-872b3f8388f4e5bd6aca2438]
At Least One Applicant Must Be a National or Resident of a Contracting State
Note:
When there are two or more applicants, at least one must be from a Contracting State.

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.

Jump to MPEP SourceNationals and ResidentsReceiving Office (RO/US)PCT International Application Filing
StatutoryRequiredAlways
[mpep-1806-87e9cbe4914bbfa53908f43e]
Inventor Information Required for National Phase
Note:
Provide inventor’s name and address if the national law of at least one designated State requires it, even if the applicant is not the inventor.

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.

Jump to MPEP SourceNationals and ResidentsReceiving Office (RO/US)Signature Requirements
StatutoryPermittedAlways
[mpep-1806-3737b594806f8ee898078eb5]
Legal Representative as Applicant for Deceased Inventor
Note:
A legal representative may apply on behalf of a deceased inventor in an international application designating the United States.

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.

Jump to MPEP Source · 37 CFR 1.422Nationals and ResidentsPCT International Application FilingPatent Cooperation Treaty
StatutoryPermittedAlways
[mpep-1806-2aad3a473376aa0ecdc087d3]
Assignee or Owner May File International Applications
Note:
Patent applications for designations other than the United States may be filed by either the assignee or owner of the invention.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012]

(c) For the purposes of designations other than the United States, international applications may be filed by the assignee or owner.

Jump to MPEP Source · 37 CFR 1.421Nationals and ResidentsAssignee as Applicant SignatureApplicant and Assignee Filing Under AIA
StatutoryPermittedAlways
[mpep-1806-d01dd1d7f7f922d515edc4f1]
Executor Can File International Application for Deceased Inventor
Note:
The executor of a deceased inventor may file an international application designating the United States on behalf of the deceased.

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.

Jump to MPEP Source · 37 CFR 1.422Nationals and ResidentsReceiving Office (RO/US)PCT International Application Filing
StatutoryPermittedAlways
[mpep-1806-669410121b096ec5ef152801]
Legal Representative May File International Application for Insane Inventor
Note:
The legal representative of an insane inventor can file an international application designating the United States on behalf of the inventor.

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.

Jump to MPEP Source · 37 CFR 1.423Nationals and ResidentsReceiving Office (RO/US)PCT International Application Filing
StatutoryPermittedAlways
[mpep-1806-55b6af99338403dd475f7d82]
Legal Representative for Deceased Inventor
Note:
A legal representative of a deceased inventor can be indicated as an applicant in the international application.

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.

Jump to MPEP Source · 37 CFR 1.423Nationals and ResidentsSignature RequirementsAssignee as Applicant Signature
Topic

Request Content and Form

8 rules
StatutoryRecommendedAlways
[mpep-1806-b8bf49981ea0dd65020ecac1]
Inventor Name and Address Required for National Phase
Note:
The inventor’s name and address must be indicated in Box No. III, while residence and nationality should be omitted if the inventor is not the applicant.

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.

Jump to MPEP SourceRequest Content and FormPCT Request FormEffect of International Filing
StatutoryRequiredAlways
[mpep-1806-2da3e343ab3f4a3e06fc4787]
Different Applicants for Designated Offices Must Be Shown on Request
Note:
The international application must indicate different applicants for various Designated Offices in the Request portion.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 on or after September 16, 2012]

(d) Any indication of different applicants for the purpose of different Designated Offices must be shown on the Request portion of the international application.

Jump to MPEP Source · 37 CFR 1.421Request Content and FormPCT Request FormPatent Cooperation Treaty
StatutoryRequiredAlways
[mpep-1806-e0b6c2d38c9450c93178b6cf]
Separate Power of Attorney Required for Withdrawal Request
Note:
A separate power of attorney from all applicants is required for any request to withdraw an international application under PCT Rule 90bis.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 on or after September 16, 2012]

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.

Jump to MPEP Source · 37 CFR 1.421Request Content and FormPOA Form RequirementsPower of Attorney Signature
StatutoryRequiredAlways
[mpep-1806-ca04ebd1681f45beb63377b7]
Different Applicants for Designated Offices Must Be Shown on Request
Note:
The international application must indicate different applicants for different Designated Offices in the Request portion.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012]

(e) Any indication of different applicants for the purpose of different Designated Offices must be shown on the Request portion of the international application.

Jump to MPEP Source · 37 CFR 1.421Request Content and FormPCT Request FormPatent Cooperation Treaty
StatutoryRequiredAlways
[mpep-1806-cdda290699dceb43b3704e75]
Separate Power of Attorney Required for Non-All-Signature Withdrawals
Note:
A separate power of attorney is needed for withdrawal requests not signed by all applicants, unless excused by the Director with a valid explanation.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012]

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.

Jump to MPEP Source · 37 CFR 1.421Request Content and FormPOA Form RequirementsPower of Attorney Signature
StatutoryProhibitedAlways
[mpep-1806-2560c04acaa27ac47e7c11f2]
Power of Attorney Waiver for Unreachable Inventors
Note:
A separate power of attorney can be waived if one or more inventors cannot be found or reached after diligent effort.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012]

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.

Jump to MPEP Source · 37 CFR 1.421Request Content and FormSignature RequirementsPower of Attorney Signature
StatutoryRecommendedAlways
[mpep-1806-892fef1629b702e73510a50e]
Requirement for Legal Representative Indication
Note:
The legal representative of a deceased inventor must be indicated in the Request as an applicant, followed by their address, nationality, and residence. The deceased inventor should also be listed separately as an inventor only.

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.

Jump to MPEP Source · 37 CFR 1.423Request Content and FormPCT Request FormAIA vs Pre-AIA Practice
StatutoryRecommendedAlways
[mpep-1806-146f6290aaf30e973fdda4fd]
Deceased Inventor Must Appear Separately in Box III
Note:
The name of the deceased inventor must appear separately in Box III with 'deceased' indicated and identified as an inventor only.

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.

Jump to MPEP Source · 37 CFR 1.423Request Content and FormSignature RequirementsAssignee as Applicant Signature
Topic

AIA Effective Dates

6 rules
StatutoryRequiredAlways
[mpep-1806-11232d8651669ff2ef74b1b1]
Requirement for U.S. Residents/Nationals to File International Applications
Note:
Only residents or nationals of the United States can file international patent applications in the U.S., with certain exceptions and requirements.
[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.
  • (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.
Jump to MPEP Source · 37 CFR 1.421AIA Effective DatesAIA Overview and Effective DatesAIA vs Pre-AIA Practice
StatutoryInformativeAlways
[mpep-1806-11b1ccbc36df771d0c00ddf4]
Requirement for Patent Applications Filed After September 16, 2012
Note:
This rule applies to patent applications filed under 35 U.S.C. 363 on or after September 16, 2012.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 on or after September 16, 2012]

Jump to MPEP Source · 37 CFR 1.422AIA Effective DatesAIA Overview and Effective DatesAIA vs Pre-AIA Practice
StatutoryRequiredAlways
[mpep-1806-ca646aa059ce6a0f956cf3eb]
Resident or National of USA Must File International Applications
Note:
Patent applications filed under 35 U.S.C. 363 before September 16, 2012 must be filed by residents or nationals of the United States.
[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.
  • (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.
Jump to MPEP Source · 37 CFR 1.421AIA Effective DatesAIA Overview and Effective DatesAIA vs Pre-AIA Practice
StatutoryInformativeAlways
[mpep-1806-2e1b295ddb4005db66323232]
Requirement for Pre-AIA Patent Applications Filed Before September 16, 2012
Note:
This rule applies to patent applications filed under 35 U.S.C. 363 before September 16, 2012.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012]

Jump to MPEP Source · 37 CFR 1.422AIA Effective DatesAIA Overview and Effective DatesAIA vs Pre-AIA Practice
StatutoryInformativeAlways
[mpep-1806-8301ad97128bb8b69cd9a25b]
Requirement for Pre-AIA Patent Applications Filed Before September 16, 2012
Note:
This rule applies to patent applications filed under 35 U.S.C. 363 before September 16, 2012.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012]

Jump to MPEP Source · 37 CFR 1.423AIA Effective DatesAIA Overview and Effective DatesAIA vs Pre-AIA Practice
StatutoryRequiredAlways
[mpep-1806-a7da4dc3fb01c9a586dc9912]
Inventors Must Be Designated as Applicants for Pre-2012 PCT Entries
Note:
For international applications filed before September 16, 2012, only inventors or their legal representatives can be designated as applicants when entering the U.S. national stage.

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.

Jump to MPEP Source · 37 CFR 1.423AIA Effective DatesEffect of International FilingNationals and Residents
Topic

Article 19 Amendment Scope

4 rules
StatutoryRequiredAlways
[mpep-1806-bc9834abbbb3f970935f3645]
Requirement for Indicating US Resident/National in International Application
Note:
If an international application does not include a U.S. resident or national, the applicant will be notified and if the fee is sufficient, the application will be forwarded to the International Bureau.

[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:

(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)).

Jump to MPEP Source · 37 CFR 1.421Article 19 Amendment ScopeReceiving Office (RO/US)Assignee as Applicant Signature
StatutoryRequiredAlways
[mpep-1806-ef4fa7a76817a5290f612902]
Requests for Withdrawal Must Be Signed by All Applicants
Note:
All applicants must sign requests to withdraw an international application, designations, priority claims, the Demand, or elections.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 on or after September 16, 2012]

(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.

Jump to MPEP Source · 37 CFR 1.421Article 19 Amendment ScopeArticle 34 AmendmentsDemand for Preliminary Examination
StatutoryRequiredAlways
[mpep-1806-f0f680022eb5baef8ae88ff3]
Applicant Without U.S. Residency or Citizenship Must Be Notified
Note:
If an international application does not indicate a U.S. resident or citizen as an applicant, the applicant will be notified and, if the fee is paid, the application will be forwarded to the International Bureau.

[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:

(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)).

Jump to MPEP Source · 37 CFR 1.421Article 19 Amendment ScopeReceiving Office (RO/US)Assignee as Applicant Signature
StatutoryRequiredAlways
[mpep-1806-db898131f94f6c1d7d0751cf]
Requests for Withdrawal Must Be Signed by All Applicants
Note:
All applicants must sign requests to withdraw an international application, designation, priority claim, demand, or election. A separate power of attorney is required if not all applicants sign.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012]

(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.

Jump to MPEP Source · 37 CFR 1.421Article 19 Amendment ScopeArticle 34 AmendmentsDemand for Preliminary Examination
Topic

Effect of International Filing

3 rules
StatutoryRequiredAlways
[mpep-1806-96383a7f44d60a761b1239b7]
Inventor Information Required for National Phase
Note:
Where the inventor is not the applicant, their information must be provided in the Request if national laws of at least one designated State require it.

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.

Jump to MPEP SourceEffect of International FilingNationals and ResidentsReceiving Office (RO/US)
StatutoryRequiredAlways
[mpep-1806-0f192e9a5b5297bd90a98101]
US Inventor Required for National Stage
Note:
An international application can proceed to the national stage in the US only if the applicant is an inventor or meets specific conditions outlined in §1.422 or §1.424.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 on or after September 16, 2012]

(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.

Jump to MPEP Source · 37 CFR 1.421Effect of International FilingNationals and ResidentsReceiving Office (RO/US)
StatutoryRequiredAlways
[mpep-1806-536005b130b919711fc6b41d]
Inventor Must File PCT Application
Note:
An international application for the United States must be filed by the inventor or as specified in sections 1.422 or 1.423.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012]

(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.

Jump to MPEP Source · 37 CFR 1.421Effect of International FilingNationals and ResidentsReceiving Office (RO/US)
Topic

Signature Requirements

3 rules
StatutoryRequiredAlways
[mpep-1806-40cc33a1f6d577c95373783d]
Separate Power of Attorney Required for Each Applicant
Note:
A distinct power of attorney must be provided from each applicant to sign the international application request.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 on or after September 16, 2012]

A separate power of attorney from each applicant may be required.

Jump to MPEP Source · 37 CFR 1.421Signature RequirementsAssignee as Applicant SignatureApplicant and Assignee Filing Under AIA
StatutoryRequiredAlways
[mpep-1806-312befbd1b9b436df4c54503]
Separate Power of Attorney Required for Each Applicant
Note:
A distinct power of attorney must be provided from each applicant for signing and filing international patent applications.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012]

A separate power of attorney from each applicant may be required.

Jump to MPEP Source · 37 CFR 1.421Signature RequirementsAssignee as Applicant SignatureApplicant and Assignee Filing Under AIA
StatutoryRecommendedAlways
[mpep-1806-02842bdadc1e9195dd7545ac]
Legal Representative as Applicant Only or Inventor
Note:
A legal representative should be indicated as an applicant only unless they are also an inventor, in which case they must be indicated as both.

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.

Jump to MPEP Source · 37 CFR 1.423Signature RequirementsAssignee as Applicant SignatureApplicant and Assignee Filing Under AIA
Topic

PCT International Application Filing

2 rules
StatutoryRequiredAlways
[mpep-1806-87b3439e5151fb21a5f6dde3]
Joint Inventors Must Jointly Apply for International Patent
Note:
This rule requires that all joint inventors must apply together for an international patent application.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 on or after September 16, 2012]

Joint inventors must jointly apply for an international application.

Jump to MPEP Source · 37 CFR 1.421PCT International Application FilingPatent Cooperation TreatyAIA Effective Dates
StatutoryRequiredAlways
[mpep-1806-37a10b3c7997744643aa9650]
Joint Inventors Must File Together for PCT Application
Note:
Joint inventors must file a single international application together, not separately, for the United States.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012]

Joint inventors must jointly apply for an international application.

Jump to MPEP Source · 37 CFR 1.421PCT International Application FilingPatent Cooperation TreatyAssignee as Applicant Signature
Topic

Receiving Office (RO/US)

2 rules
StatutoryPermittedAlways
[mpep-1806-0922bc1abc171ba317251661]
Attorney May Sign International Application Request
Note:
A registered attorney of the applicant may sign and file the international application request on behalf of the applicant, requiring a separate power of attorney from each applicant.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 on or after September 16, 2012]

(c) A registered attorney or agent of the applicant may sign the international application Request and file the international application for the applicant.

Jump to MPEP Source · 37 CFR 1.421Receiving Office (RO/US)Request Content and FormSignature Requirements
StatutoryPermittedAlways
[mpep-1806-a6e0273b5dc19f538607754d]
Attorney May Sign and File International Application on Behalf of Applicant
Note:
A registered attorney or agent of the applicant may sign and file an international application on behalf of the applicant, requiring a separate power of attorney from each applicant.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012]

(d) A registered attorney or agent of the applicant may sign the international application Request and file the international application for the applicant.

Jump to MPEP Source · 37 CFR 1.421Receiving Office (RO/US)Request Content and FormSignature Requirements
Topic

Assignee as Applicant Signature

2 rules
StatutoryRequiredAlways
[mpep-1806-c5f01759a5088095cb0f42ab]
Requests for Changes in Applicant Indications Must Be Signed by All Applicants
Note:
Requests to change the applicant, agent, or common representative in an international application must follow PCT Rule 92bis and be signed by all applicants.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 on or after September 16, 2012]

(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.

Jump to MPEP Source · 37 CFR 1.421Assignee as Applicant SignatureApplicant and Assignee Filing Under AIAAIA Effective Dates
StatutoryRequiredAlways
[mpep-1806-6e5a5944c6f35e4c55260949]
Requests for Changes to Applicant Information Must Follow PCT Rule 92bis and Be Signed by All Applicants
Note:
Requests to change the applicant, agent, or common representative in an international application must comply with PCT Rule 92bis and be signed by all applicants.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012]

(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.

Jump to MPEP Source · 37 CFR 1.421Assignee as Applicant SignatureApplicant and Assignee Filing Under AIAAIA vs Pre-AIA Practice
Topic

Patent Cooperation Treaty

1 rules
StatutoryInformativeAlways
[mpep-1806-766bbd737127e406d21965e4]
Resident or National of Contracting State Required
Note:
An international application must be filed by an individual, corporate entity, or other concern where at least one applicant is a national or resident of a Contracting State.

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.

Jump to MPEP SourcePatent Cooperation TreatyNationals and ResidentsReceiving Office (RO/US)
Topic

Statement Under Article 19

1 rules
StatutoryRequiredAlways
[mpep-1806-fda8eb367819374b9d235694]
Request for Withdrawal Must Explain Missing Signature
Note:
A request to withdraw an international application must be accompanied by a statement explaining the lack of required signatures to the satisfaction of the Director.

[Editor Note: Applicable to patent applications filed under 35 U.S.C. 363 before September 16, 2012]

Such a request must be accompanied by a statement explaining to the satisfaction of the Director the lack of the signature concerned.

Jump to MPEP Source · 37 CFR 1.421Statement Under Article 19Request Content and FormSignature Requirements

Citations

Primary topicCitation
AIA Effective Dates
Article 19 Amendment Scope
Assignee as Applicant Signature
Effect of International Filing
Nationals and Residents
PCT International Application Filing
Receiving Office (RO/US)
Request Content and Form
Signature Requirements
Statement Under Article 19
35 U.S.C. § 363
AIA Effective Dates
Article 19 Amendment Scope
37 CFR § 1.412(c)(6)
AIA Effective Dates
Effect of International Filing
PCT International Application Filing
37 CFR § 1.422
AIA Effective Dates
Effect of International Filing
PCT International Application Filing
37 CFR § 1.424
AIA Effective Dates
Article 19 Amendment Scope
37 CFR § 1.445(a)(4)
Nationals and Residents
Patent Cooperation Treaty
PCT Rule 18
Effect of International Filing
Nationals and Residents
Request Content and Form
PCT Rule 4.1(a)(iv)
Nationals and Residents
Patent Cooperation Treaty
PCT Article 9
AIA Effective Dates
Article 19 Amendment Scope
Request Content and Form
Statement Under Article 19
PCT Rule 90bis
AIA Effective Dates
Assignee as Applicant Signature
PCT Rule 92bis

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