What is the definition of ‘applicant’ in patent applications?

This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice.

What is the definition of ‘applicant’ in patent applications?

According to MPEP 605, the term ‘applicant’ refers to the inventor or joint inventors who are applying for a patent. The MPEP states: ‘The applicant for a patent is the inventor or joint inventors.’ This definition applies to patent applications filed on or after September 16, 2012. For applications filed before this date, the applicant could be the assignee, obligated assignee, or person who otherwise shows sufficient proprietary interest in the matter.