How does the USPTO handle proof of refusal for a non-signing inventor?

The USPTO has specific guidelines for handling proof of refusal from a non-signing inventor. According to MPEP 409.03(d):

In the case of refusal, the proof that a bona fide attempt was made to present a copy of the application papers to the non-signing inventor for signature, but the inventor refused to sign the papers, must be submitted.

To demonstrate proof of refusal, an applicant should:

• Provide evidence of attempts to present the application to the inventor
• Document the inventor’s explicit refusal to sign
• Include any communication or statements from the inventor indicating refusal
• Submit an affidavit or declaration detailing the refusal circumstances

The USPTO will review this evidence to determine if it constitutes a valid proof of refusal.

To learn more:

• proof of refusal
• non-signing inventor
• USPTO guidelines
• patent application