MPEP § 409.01(a) — Deceased or Legally Incapacitated Inventor – Application Filed on or After September 16, 2012 (Annotated Rules)

§409.01(a) Deceased or Legally Incapacitated Inventor – Application Filed on or After September 16, 2012

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

This page consolidates and annotates all enforceable requirements under MPEP § 409.01(a), 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.

Deceased or Legally Incapacitated Inventor – Application Filed on or After September 16, 2012

This section addresses Deceased or Legally Incapacitated Inventor – Application Filed on or After September 16, 2012. Primary authority: 35 U.S.C. 117, 35 U.S.C. 118, and 37 CFR 1.64. Contains: 4 requirements and 2 permissions.

Key Rules

Topic

PTAB Contested Case Procedures

2 rules
StatutoryPermittedAlways
[mpep-409-01-a-654b06c9e6a771198aa5135f]
Application by Assignee for Deceased Inventor
Note:
An assignee, obligated assignee, or person with sufficient proprietary interest can file a patent application on behalf of a deceased inventor.

Under 37 CFR 1.46, a person to whom the inventor assigned (“assignee”), to whom the inventor was under an obligation to assign (“obligated assignee”), or a person who otherwise shows sufficient proprietary interest in the matter may make an application for patent on behalf of the deceased or legally incapacitated inventor. See 35 U.S.C. 118. If the 37 CFR 1.46 applicant is the assignee or obligated assignee of the deceased or legally incapacitated inventor’s interest, or a party who showed/can show a sufficient proprietary interest in the claimed invention, there is no need to involve the legal representative as the 37 CFR 1.46 applicant can execute the substitute statement. See MPEP § 409.05 for more information. See 37 CFR 1.64 and MPEP § 604 concerning the execution of a substitute statement by a 37 CFR 1.46 applicant in lieu of an oath or declaration.

Jump to MPEP Source · 37 CFR 1.46PTAB Contested Case Procedures
StatutoryPermittedAlways
[mpep-409-01-a-ac85fca07a585641b133a0b2]
37 CFR 1.46 Assignee Can Execute Substitute Statement
Note:
An assignee of a deceased or legally incapacitated inventor can execute the substitute statement without involving a legal representative.

Under 37 CFR 1.46, a person to whom the inventor assigned (“assignee”), to whom the inventor was under an obligation to assign (“obligated assignee”), or a person who otherwise shows sufficient proprietary interest in the matter may make an application for patent on behalf of the deceased or legally incapacitated inventor. See 35 U.S.C. 118. If the 37 CFR 1.46 applicant is the assignee or obligated assignee of the deceased or legally incapacitated inventor’s interest, or a party who showed/can show a sufficient proprietary interest in the claimed invention, there is no need to involve the legal representative as the 37 CFR 1.46 applicant can execute the substitute statement. See MPEP § 409.05 for more information. See 37 CFR 1.64 and MPEP § 604 concerning the execution of a substitute statement by a 37 CFR 1.46 applicant in lieu of an oath or declaration.

Jump to MPEP Source · 37 CFR 1.46PTAB Contested Case Procedures
Topic

Power of Attorney by Assignee

2 rules
StatutoryRequiredAlways
[mpep-409-01-a-fa67212f49ee9781dd9f57a5]
Living Inventors Must Prove Deceased Co-Inventor Died
Note:
When a co-inventor dies after filing an application, living inventors must submit proof to the USPTO.

When an application is being prosecuted by joint inventor-applicants without a joint inventor-applicant or patent practitioner having been granted a power of attorney, and a joint inventor-applicant dies after filing the application, the living joint inventor(s) who are the applicant must submit proof that the other joint inventor-applicant is dead. Upon submission of such proof, only the signatures of the living joint inventor-applicants are required on the papers filed with the USPTO if the legal representative of the deceased inventor does not intervene. If the legal representative of the deceased inventor wishes to intervene, the legal representative must submit a substitute statement in compliance with 37 CFR 1.64. Once the legal representative of the deceased inventor intervenes in the pro se application, the signatures of the living joint inventors and the legal representative are required on the papers filed with the USPTO, until the legal representative and living joint inventors appoint a representative.

Jump to MPEP Source · 37 CFR 1.64Power of Attorney by AssigneePOA for Joint ApplicantsPower of Attorney
StatutoryRequiredAlways
[mpep-409-01-a-7d905fe2309cb994f1e210ef]
Legal Representative Must Submit Substitute Statement
Note:
If the legal representative of a deceased inventor wishes to intervene, they must submit a statement in compliance with 37 CFR 1.64.

When an application is being prosecuted by joint inventor-applicants without a joint inventor-applicant or patent practitioner having been granted a power of attorney, and a joint inventor-applicant dies after filing the application, the living joint inventor(s) who are the applicant must submit proof that the other joint inventor-applicant is dead. Upon submission of such proof, only the signatures of the living joint inventor-applicants are required on the papers filed with the USPTO if the legal representative of the deceased inventor does not intervene. If the legal representative of the deceased inventor wishes to intervene, the legal representative must submit a substitute statement in compliance with 37 CFR 1.64. Once the legal representative of the deceased inventor intervenes in the pro se application, the signatures of the living joint inventors and the legal representative are required on the papers filed with the USPTO, until the legal representative and living joint inventors appoint a representative.

Jump to MPEP Source · 37 CFR 1.64Power of Attorney by AssigneePOA for Joint ApplicantsPower of Attorney
Topic

POA for Joint Applicants

2 rules
StatutoryRequiredAlways
[mpep-409-01-a-49f570df2c0c0ecbc74e3d8b]
Living Inventors' Signatures Required After Deceased Co-Inventor Dies
Note:
When a co-inventor dies after filing, living inventors must sign papers unless the deceased's legal representative intervenes.

When an application is being prosecuted by joint inventor-applicants without a joint inventor-applicant or patent practitioner having been granted a power of attorney, and a joint inventor-applicant dies after filing the application, the living joint inventor(s) who are the applicant must submit proof that the other joint inventor-applicant is dead. Upon submission of such proof, only the signatures of the living joint inventor-applicants are required on the papers filed with the USPTO if the legal representative of the deceased inventor does not intervene. If the legal representative of the deceased inventor wishes to intervene, the legal representative must submit a substitute statement in compliance with 37 CFR 1.64. Once the legal representative of the deceased inventor intervenes in the pro se application, the signatures of the living joint inventors and the legal representative are required on the papers filed with the USPTO, until the legal representative and living joint inventors appoint a representative.

Jump to MPEP Source · 37 CFR 1.64POA for Joint ApplicantsPower of Attorney by AssigneePower of Attorney
StatutoryRequiredAlways
[mpep-409-01-a-b257208b2e73881f644b5914]
Legal Representative Required for Joint Inventor Application
Note:
When a deceased inventor's legal representative intervenes, both living joint inventors and the legal representative must sign papers filed with the USPTO until they appoint a new representative.

When an application is being prosecuted by joint inventor-applicants without a joint inventor-applicant or patent practitioner having been granted a power of attorney, and a joint inventor-applicant dies after filing the application, the living joint inventor(s) who are the applicant must submit proof that the other joint inventor-applicant is dead. Upon submission of such proof, only the signatures of the living joint inventor-applicants are required on the papers filed with the USPTO if the legal representative of the deceased inventor does not intervene. If the legal representative of the deceased inventor wishes to intervene, the legal representative must submit a substitute statement in compliance with 37 CFR 1.64. Once the legal representative of the deceased inventor intervenes in the pro se application, the signatures of the living joint inventors and the legal representative are required on the papers filed with the USPTO, until the legal representative and living joint inventors appoint a representative.

Jump to MPEP Source · 37 CFR 1.64POA for Joint ApplicantsPower of Attorney by AssigneePower of Attorney
Topic

AIA Effective Dates

1 rules
MPEP GuidanceInformativeAlways
[mpep-409-01-a-6f88131fb803e0d7c4d46db7]
Requirement for Deceased Inventor Actions in Pre-September 16, 2012 Applications
Note:
The rule outlines the requirements for handling applications filed before September 16, 2012, when an inventor is deceased or legally incapacitated.

[Editor Note: See MPEP § 409.01(b) for information pertaining to a deceased or legally incapacitated inventor in an application filed before September 16, 2012.]

Jump to MPEP SourceAIA Effective DatesAIA Overview and Effective DatesAIA vs Pre-AIA Practice

Citations

Primary topicCitation
35 U.S.C. § 117
PTAB Contested Case Procedures35 U.S.C. § 118
PTAB Contested Case Procedures37 CFR § 1.46
POA for Joint Applicants
PTAB Contested Case Procedures
Power of Attorney by Assignee
37 CFR § 1.64
AIA Effective DatesMPEP § 409.01(b)
PTAB Contested Case ProceduresMPEP § 409.05
PTAB Contested Case ProceduresMPEP § 604

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