Can a patent application be filed if one joint inventor refuses to sign?
Yes, a patent application can be filed even if one joint inventor refuses to sign, provided certain conditions are met. According to MPEP 409.03(a):
“Pre-AIA 37 CFR 1.47(a) and pre-AIA 35 U.S.C. 116, second paragraph, requires all available joint inventors to file an application ‘on behalf of’ themselves and on behalf of a joint inventor who ‘cannot be found or reached after diligent effort’ or who refuses to ‘join in an application.'”
To file the application, the available joint inventors must make an oath or declaration on their own behalf and on behalf of the nonsigning inventor. Additionally, proof must be provided that the nonsigning inventor refuses to execute the application papers. This process allows the patent application to proceed despite the refusal of one joint inventor to participate.
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