MPEP § 409.03(d) — Proof of Unavailability or Refusal (Annotated Rules)

§409.03(d) Proof of Unavailability or Refusal

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

This page consolidates and annotates all enforceable requirements under MPEP § 409.03(d), 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.

Proof of Unavailability or Refusal

This section addresses Proof of Unavailability or Refusal. Primary authority: 37 CFR 1.47 and 37 CFR 1.43. Contains: 3 requirements, 5 guidance statements, 3 permissions, and 2 other statements.

Key Rules

Topic

Inventor's Oath/Declaration Requirements

5 rules
StatutoryInformativeAlways
[mpep-409-03-d-758366f116dd3d843a5673bf]
Vacation Not Excuse for Filing Under Pre-AIA 37 CFR 1.47
Note:
A nonsigning inventor being on vacation is not a valid reason for filing under pre-AIA 37 CFR 1.47.

The fact that a nonsigning inventor is on vacation or out of town and is therefore temporarily unavailable to sign the declaration is not an acceptable reason for filing under pre-AIA 37 CFR 1.47.

Jump to MPEP Source · 37 CFR 1.47Inventor's Oath/Declaration RequirementsAIA vs Pre-AIA Practice
StatutoryRecommendedAlways
[mpep-409-03-d-fd64e3f3df611bd0efb20440]
Requirement for Bona Fide Signature Attempt
Note:
A genuine effort to present application papers to the inventor for signature must be documented, especially if the inventor refuses.

Proof that a bona fide attempt was made to present a copy of the application papers (specification, including claims, drawings, and oath or declaration) to the nonsigning inventor for signature, but the inventor refused to accept delivery of the papers or expressly stated that the application papers should not be sent, may be sufficient. When there is an express oral refusal, that fact along with the time and place of the refusal must be stated in the statement of facts. When there is an express written refusal, a copy of the document evidencing that refusal must be made part of the statement of facts. The document may be redacted to remove material not related to the inventor’s reasons for refusal.

Jump to MPEP SourceInventor's Oath/Declaration RequirementsInventor Signature RequirementsPatent Application Content
StatutoryRequiredAlways
[mpep-409-03-d-a28e1b8df69cebce7fb4bcd0]
Requirement for Stating Express Oral Refusal
Note:
When an inventor orally refuses to sign the application, the refusal must be stated along with the time and place of the refusal in the statement of facts.

Proof that a bona fide attempt was made to present a copy of the application papers (specification, including claims, drawings, and oath or declaration) to the nonsigning inventor for signature, but the inventor refused to accept delivery of the papers or expressly stated that the application papers should not be sent, may be sufficient. When there is an express oral refusal, that fact along with the time and place of the refusal must be stated in the statement of facts. When there is an express written refusal, a copy of the document evidencing that refusal must be made part of the statement of facts. The document may be redacted to remove material not related to the inventor’s reasons for refusal.

Jump to MPEP SourceInventor's Oath/Declaration RequirementsInventor Signature RequirementsPatent Application Content
StatutoryRequiredAlways
[mpep-409-03-d-619f3d3705182e82b721e76c]
Copy of Document Showing Refusal Must Be Included
Note:
When an inventor refuses to sign the application papers in writing, a copy of that refusal must be included in the statement of facts.

Proof that a bona fide attempt was made to present a copy of the application papers (specification, including claims, drawings, and oath or declaration) to the nonsigning inventor for signature, but the inventor refused to accept delivery of the papers or expressly stated that the application papers should not be sent, may be sufficient. When there is an express oral refusal, that fact along with the time and place of the refusal must be stated in the statement of facts. When there is an express written refusal, a copy of the document evidencing that refusal must be made part of the statement of facts. The document may be redacted to remove material not related to the inventor’s reasons for refusal.

Jump to MPEP SourceInventor's Oath/Declaration RequirementsInventor Signature RequirementsPatent Application Content
StatutoryPermittedAlways
[mpep-409-03-d-f843c28ec29100862bbfad4d]
Application Documents May Be Redacted for Refusal
Note:
The document may be modified to exclude parts not related to the inventor’s reasons for refusing to sign the application papers.

Proof that a bona fide attempt was made to present a copy of the application papers (specification, including claims, drawings, and oath or declaration) to the nonsigning inventor for signature, but the inventor refused to accept delivery of the papers or expressly stated that the application papers should not be sent, may be sufficient. When there is an express oral refusal, that fact along with the time and place of the refusal must be stated in the statement of facts. When there is an express written refusal, a copy of the document evidencing that refusal must be made part of the statement of facts. The document may be redacted to remove material not related to the inventor’s reasons for refusal.

Jump to MPEP SourceInventor's Oath/Declaration RequirementsInventor Signature RequirementsPatent Application Content
Topic

AIA vs Pre-AIA Practice

4 rules
StatutoryRecommendedAlways
[mpep-409-03-d-7d9bfc9123b5f285fc1f826d]
Statement of Facts for Nonsigning Inventor's Unavailability
Note:
Submit a detailed statement describing the efforts made to locate and contact a nonsigning inventor before filing under pre-AIA 37 CFR 1.47.

Where inability to find or reach a nonsigning inventor “after diligent effort” is the reason for filing under pre-AIA 37 CFR 1.47, a statement of facts should be submitted that fully describes the exact facts which are relied on to establish that a diligent effort was made.

Jump to MPEP Source · 37 CFR 1.47AIA vs Pre-AIA Practice
StatutoryInformativeAlways
[mpep-409-03-d-a4987bf391b10ed5b303de4c]
Incompetence Not Excuse for Filing Under Pre-AIA 37 CFR 1.47
Note:
An inventor's hospitalization or unconscious state does not justify filing under pre-AIA 37 CFR 1.47; alternative provisions may apply.

Furthermore, the fact that an inventor is hospitalized and/or is not conscious is not an acceptable reason for filing under pre-AIA 37 CFR 1.47. Pre-AIA 37 CFR 1.43 may be available under these circumstances. See MPEP § 409.01(b). Such a petition under pre-AIA 37 CFR 1.47 will be dismissed as inappropriate.

Jump to MPEP Source · 37 CFR 1.47AIA vs Pre-AIA PracticeDirector Authority and Petitions (MPEP 1000)
StatutoryPermittedAlways
[mpep-409-03-d-e1489c17cbab72c1153861b6]
Petition for Pre-AIA Filing Under Special Circumstances
Note:
Allows filing under pre-AIA rules when an inventor is hospitalized or unconscious, subject to petition approval.

Furthermore, the fact that an inventor is hospitalized and/or is not conscious is not an acceptable reason for filing under pre-AIA 37 CFR 1.47. Pre-AIA 37 CFR 1.43 may be available under these circumstances. See MPEP § 409.01(b). Such a petition under pre-AIA 37 CFR 1.47 will be dismissed as inappropriate.

Jump to MPEP Source · 37 CFR 1.47AIA vs Pre-AIA PracticeDirector Authority and Petitions (MPEP 1000)
StatutoryInformativeAlways
[mpep-409-03-d-008d0fdf3886baa3aa9f3409]
Petition Under Pre-AIA 37 CFR 1.47 Inappropriate
Note:
A petition under pre-AIA 37 CFR 1.47 will be dismissed if an inventor is hospitalized or unconscious.

Furthermore, the fact that an inventor is hospitalized and/or is not conscious is not an acceptable reason for filing under pre-AIA 37 CFR 1.47. Pre-AIA 37 CFR 1.43 may be available under these circumstances. See MPEP § 409.01(b). Such a petition under pre-AIA 37 CFR 1.47 will be dismissed as inappropriate.

Jump to MPEP Source · 37 CFR 1.47AIA vs Pre-AIA PracticeDirector Authority and Petitions (MPEP 1000)
Topic

Documents Requiring Signature

3 rules
StatutoryRequiredAlways
[mpep-409-03-d-ae8225a2b5adb7891f95b9e5]
Statement of Facts Must Be Signed by Someone with Firsthand Knowledge
Note:
The statement of facts must be signed by someone who has firsthand knowledge of the recited facts. Hearsay statements are not accepted, and efforts to locate unavailable inventors should be documented.

The statement of facts must be signed, where at all possible, by a person having firsthand knowledge of the facts recited therein. Statements based on hearsay will not normally be accepted. Copies of documentary evidence such as Internet searches, certified mail return receipts, cover letters of instructions, telegrams, that support a finding that the nonsigning inventor could not be found or reached should be made part of the statement. The steps taken to locate the whereabouts of the nonsigning inventor should be included in the statement of facts. It is important that the statement contain facts as opposed to conclusions.

Jump to MPEP SourceDocuments Requiring SignatureSignature Requirements
StatutoryRecommendedAlways
[mpep-409-03-d-2657e1697989df2b43ea9dbe]
Requirement for Supporting Non-Signing Inventor's Unavailability
Note:
Copies of documentary evidence supporting the inventor’s unavailability must be included in the statement of facts.

The statement of facts must be signed, where at all possible, by a person having firsthand knowledge of the facts recited therein. Statements based on hearsay will not normally be accepted. Copies of documentary evidence such as Internet searches, certified mail return receipts, cover letters of instructions, telegrams, that support a finding that the nonsigning inventor could not be found or reached should be made part of the statement. The steps taken to locate the whereabouts of the nonsigning inventor should be included in the statement of facts. It is important that the statement contain facts as opposed to conclusions.

Jump to MPEP SourceDocuments Requiring SignatureSignature Requirements
StatutoryRecommendedAlways
[mpep-409-03-d-2e19674a3328207b667011de]
Steps Taken to Find Nonsigning Inventor Must Be Included in Statement of Facts
Note:
The statement of facts must include the steps taken to locate a nonsigning inventor, ensuring it contains factual information rather than conclusions.

The statement of facts must be signed, where at all possible, by a person having firsthand knowledge of the facts recited therein. Statements based on hearsay will not normally be accepted. Copies of documentary evidence such as Internet searches, certified mail return receipts, cover letters of instructions, telegrams, that support a finding that the nonsigning inventor could not be found or reached should be made part of the statement. The steps taken to locate the whereabouts of the nonsigning inventor should be included in the statement of facts. It is important that the statement contain facts as opposed to conclusions.

Jump to MPEP SourceDocuments Requiring SignatureSignature Requirements
Topic

Access to Correspondence

2 rules
StatutoryRecommendedAlways
[mpep-409-03-d-01bd9065e0f6afd64c2a3d4b]
Application Papers Must Be Sent to Nonsigning Inventor’s Address
Note:
The application papers must be sent to the last known address of a nonsigning inventor, or to their attorney if represented by counsel.

A refusal by an inventor to sign an oath or declaration when the inventor has not been presented with the application papers does not itself suggest that the inventor is refusing to join the application unless it is clear that the inventor understands exactly what he or she is being asked to sign and refuses to accept the application papers. A copy of the application papers should be sent to the last known address of the nonsigning inventor, or, if the nonsigning inventor is represented by counsel, to the address of the nonsigning inventor’s attorney. The fact that an application may contain proprietary information does not relieve the pre-AIA 37 CFR 1.47 applicant of the responsibility to present the application papers to the inventor if the inventor is willing to receive the papers in order to sign the oath or declaration. It is noted that the inventor may obtain a complete copy of the application, unless the inventor has assigned his or her interest in the application, and the assignee has requested that the inventor not be permitted access. See MPEP § 106. It is reasonable to require that the inventor be presented with the application papers before a petition under pre-AIA 37 CFR 1.47 is granted since such a procedure ensures that the inventor is apprised of the application to which the oath or declaration is directed. In re Gray, 115 USPQ 80 (Comm’r Pat. 1956).

Jump to MPEP Source · 37 CFR 1.47Access to CorrespondenceAccess to Oath/DeclarationAssignee as Applicant Signature
StatutoryPermittedAlways
[mpep-409-03-d-2743530aef9e2df2c4c9dfa6]
Inventor Must Receive Application Papers Before Signing Oath
Note:
The applicant must present the application papers to the willing inventor before signing the oath or declaration, even if the application contains proprietary information.

A refusal by an inventor to sign an oath or declaration when the inventor has not been presented with the application papers does not itself suggest that the inventor is refusing to join the application unless it is clear that the inventor understands exactly what he or she is being asked to sign and refuses to accept the application papers. A copy of the application papers should be sent to the last known address of the nonsigning inventor, or, if the nonsigning inventor is represented by counsel, to the address of the nonsigning inventor’s attorney. The fact that an application may contain proprietary information does not relieve the pre-AIA 37 CFR 1.47 applicant of the responsibility to present the application papers to the inventor if the inventor is willing to receive the papers in order to sign the oath or declaration. It is noted that the inventor may obtain a complete copy of the application, unless the inventor has assigned his or her interest in the application, and the assignee has requested that the inventor not be permitted access. See MPEP § 106. It is reasonable to require that the inventor be presented with the application papers before a petition under pre-AIA 37 CFR 1.47 is granted since such a procedure ensures that the inventor is apprised of the application to which the oath or declaration is directed. In re Gray, 115 USPQ 80 (Comm’r Pat. 1956).

Jump to MPEP Source · 37 CFR 1.47Access to CorrespondenceAccess to Oath/DeclarationAssignee as Applicant Signature
Topic

PTAB Contested Case Procedures

2 rules
StatutoryRequiredAlways
[mpep-409-03-d-5375e6f93113692c00396a13]
Requirement for Specifying Circumstances of Refusal to Sign Application Papers
Note:
The circumstances surrounding the presentation and refusal must be detailed in a statement by the person involved.

Where a refusal of the inventor to sign the application papers is alleged, the circumstances of the presentation of the application papers and of the refusal must be specified in a statement of facts by the person who presented the inventor with the application papers and/or to whom the refusal was made. Statements by a party not present when an oral refusal is made will not be accepted.

Jump to MPEP SourcePTAB Contested Case Procedures
StatutoryInformativeAlways
[mpep-409-03-d-1201cb9d112ac224e5e903c7]
Requirement for Present Party to State Refusal
Note:
A party must provide a statement of refusal when present; statements by absent parties will not be accepted.

Where a refusal of the inventor to sign the application papers is alleged, the circumstances of the presentation of the application papers and of the refusal must be specified in a statement of facts by the person who presented the inventor with the application papers and/or to whom the refusal was made. Statements by a party not present when an oral refusal is made will not be accepted.

Jump to MPEP SourcePTAB Contested Case Procedures
Topic

Assignee as Applicant Signature

2 rules
StatutoryRecommendedAlways
[mpep-409-03-d-c3813467893de45dc468dd03]
Petition Must State Facts About Nonsigning Inventor’s Refusal
Note:
The petition must include all facts supporting the conclusion that a nonsigning inventor refused to sign, along with any documentary evidence.

When it is concluded by the pre-AIA 37 CFR 1.47 applicant that a nonsigning inventor’s conduct constitutes a refusal, all facts upon which that conclusion is based should be stated in the statement of facts in support of the petition or directly in the petition. If there is documentary evidence to support facts alleged in the petition or in any statement of facts, such evidence should be submitted. Whenever a nonsigning inventor gives a reason for refusing to sign the application oath or declaration, that reason should be stated in the petition. See also MPEP § 1702.

Jump to MPEP Source · 37 CFR 1.47Assignee as Applicant SignatureApplicant and Assignee Filing Under AIAAIA vs Pre-AIA Practice
StatutoryRecommendedAlways
[mpep-409-03-d-d5218df36967231da0a2cb56]
Reason for Refusal Must Be Stated in Petition
Note:
Whenever a nonsigning inventor provides a reason for refusing to sign the application oath or declaration, that reason must be stated in the petition.

When it is concluded by the pre-AIA 37 CFR 1.47 applicant that a nonsigning inventor’s conduct constitutes a refusal, all facts upon which that conclusion is based should be stated in the statement of facts in support of the petition or directly in the petition. If there is documentary evidence to support facts alleged in the petition or in any statement of facts, such evidence should be submitted. Whenever a nonsigning inventor gives a reason for refusing to sign the application oath or declaration, that reason should be stated in the petition. See also MPEP § 1702.

Jump to MPEP Source · 37 CFR 1.47Assignee as Applicant SignatureApplicant and Assignee Filing Under AIAAIA vs Pre-AIA Practice
Topic

Access to Oath/Declaration

1 rules
StatutoryInformativeAlways
[mpep-409-03-d-01e7a3dda5fe29655971f9a7]
Application Papers Required Before Refusal Determination
Note:
Inventors must be presented with application papers before their refusal to sign an oath or declaration can be considered a refusal to join the application.

A refusal by an inventor to sign an oath or declaration when the inventor has not been presented with the application papers does not itself suggest that the inventor is refusing to join the application unless it is clear that the inventor understands exactly what he or she is being asked to sign and refuses to accept the application papers. A copy of the application papers should be sent to the last known address of the nonsigning inventor, or, if the nonsigning inventor is represented by counsel, to the address of the nonsigning inventor’s attorney. The fact that an application may contain proprietary information does not relieve the pre-AIA 37 CFR 1.47 applicant of the responsibility to present the application papers to the inventor if the inventor is willing to receive the papers in order to sign the oath or declaration. It is noted that the inventor may obtain a complete copy of the application, unless the inventor has assigned his or her interest in the application, and the assignee has requested that the inventor not be permitted access. See MPEP § 106. It is reasonable to require that the inventor be presented with the application papers before a petition under pre-AIA 37 CFR 1.47 is granted since such a procedure ensures that the inventor is apprised of the application to which the oath or declaration is directed. In re Gray, 115 USPQ 80 (Comm’r Pat. 1956).

Jump to MPEP Source · 37 CFR 1.47Access to Oath/DeclarationAccess to Specific Document TypesAccess to Correspondence

Citations

Primary topicCitation
AIA vs Pre-AIA Practice37 CFR § 1.43
AIA vs Pre-AIA Practice
Access to Correspondence
Access to Oath/Declaration
Assignee as Applicant Signature
Inventor's Oath/Declaration Requirements
37 CFR § 1.47
Access to Correspondence
Access to Oath/Declaration
MPEP § 106
Assignee as Applicant SignatureMPEP § 1702
AIA vs Pre-AIA PracticeMPEP § 409.01(b)

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