Patent prosecution

Patent prosecution describes the interaction between applicants and their representatives, and a patent office with regard to a patent, or an application for a patent. Broadly, patent prosecution can be split into pre-grant prosecution, which involves negotiation with a patent office for the grant of a patent, and post-grant prosecution, which involves issues such as post-grant amendment and opposition.

Patent prosecution is distinct from patent litigation, which describes legal action relating to the infringement of patents.

The rules and laws governing patent prosecution are often laid out in manuals released by the Patent Offices of various governments, such as the Manual of Patent Examining Procedure (MPEP) in the United States, or the Manual of Patent Office Practice (MOPOP) in Canada.

Pre-grant prosecution

Preparation of an application

To obtain patent rights for an inventor, the practitioner typically first drafts an application by interviewing the inventor to understand the nature of the invention and help clarify its novel features. Practitioners need to ascertain what is already known to people familiar with the general field of the invention—such already-known material is termed the prior art, and to obtain drawings and written notes regarding the features of the invention and the background.