Who can file a patent application as the applicant?

For applications filed on or after September 16, 2012, the following parties may file a patent application as the applicant:

• The inventor(s)
• An assignee to whom the inventor has assigned the invention
• An obligated assignee to whom the inventor is under an obligation to assign the invention
• A person who otherwise shows sufficient proprietary interest in the matter

As stated in 37 CFR 1.46(a): “A person to whom the inventor has assigned or is under an obligation to assign the invention may make an application for patent. A person who otherwise shows sufficient proprietary interest in the matter may make an application for patent on behalf of and as agent for the inventor on proof of the pertinent facts and a showing that such action is appropriate to preserve the rights of the parties.”