MPEP § 409 — Death, Legal Incapacity, or Unavailability of Inventor (Annotated Rules)

§409 Death, Legal Incapacity, or Unavailability of Inventor

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

This page consolidates and annotates all enforceable requirements under MPEP § 409, 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.

Death, Legal Incapacity, or Unavailability of Inventor

This section addresses Death, Legal Incapacity, or Unavailability of Inventor.

Key Rules

Topic

AIA Effective Dates

4 rules
MPEP GuidanceInformativeAlways
[mpep-409-536ab7908c3bc28496083ddc]
Requirement for Posthumous Patent Applications
Note:
For patent applications filed after September 16, 2012, on behalf of deceased or incapacitated inventors, specific procedures must be followed as outlined in MPEP § 409.01(a).

For information regarding applications for patent filed on or after September 16, 2012 on behalf of a deceased or legally incapacitated inventor, see MPEP § 409.01(a). For information regarding applications for patent filed on or after September 16, 2012 where the inventor or at least one joint inventor is unavailable, see MPEP §§ 409.02, 604, and 605.

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MPEP GuidanceInformativeAlways
[mpep-409-9fac3c5b99a124dd07a80300]
Requirement for Unavailable Inventors After September 16, 2012
Note:
This rule outlines the requirements for patent applications filed after September 16, 2012, when at least one inventor is unavailable due to death or legal incapacity.

For information regarding applications for patent filed on or after September 16, 2012 on behalf of a deceased or legally incapacitated inventor, see MPEP § 409.01(a). For information regarding applications for patent filed on or after September 16, 2012 where the inventor or at least one joint inventor is unavailable, see MPEP §§ 409.02, 604, and 605.

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MPEP GuidanceInformativeAlways
[mpep-409-82b5e0fbd4c862fcbd672a80]
Requirement for Deceased Inventor Applications Before September 16, 2012
Note:
This rule outlines the requirements for patent applications filed before September 16, 2012, on behalf of deceased inventors.

For information regarding applications for patent filed before September 16, 2012 on behalf of a deceased inventor or legally incapacitated inventor, see MPEP § 409.01(b). For information regarding applications for patent filed before September 16, 2012 where at least one inventor is unavailable, see MPEP §§ 409.03 – 409.03(j).

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MPEP GuidanceInformativeAlways
[mpep-409-120cfdcb2eb0fb77e3a4e16a]
Requirement for Handling Patent Applications with Unavailable Inventors Before Sept 16, 2012
Note:
Describes the procedures for filing patent applications where at least one inventor is unavailable before September 16, 2012.

For information regarding applications for patent filed before September 16, 2012 on behalf of a deceased inventor or legally incapacitated inventor, see MPEP § 409.01(b). For information regarding applications for patent filed before September 16, 2012 where at least one inventor is unavailable, see MPEP §§ 409.03 – 409.03(j).

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Citations

Primary topicCitation
AIA Effective DatesMPEP § 409.01(a)
AIA Effective DatesMPEP § 409.01(b)
AIA Effective DatesMPEP § 409.02
AIA Effective DatesMPEP § 409.03

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