Patent prosecution

Patent prosecution is the interaction between applicants and a patent office with regard to a patent application or a patent.

The prosecution process is broadly divided into two phases: pre-grant and post-grant prosecution. Pre-grant prosecution includes the drafting and filing of patent applications, responding to patent office actions, and navigating the examination process to meet all legal requirements for patentability. This phase requires a strategic presentation of the invention's novelty and inventive step over existing technologies. Post-grant prosecution deals with activities that occur after a patent has been granted. This includes maintaining the patent, handling oppositions or challenges from third parties, and making amendments or corrections to the patent documentation. It ensures that the patent remains enforceable and continues to provide value to the patent holder. 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. The formalities and substantive requirements for filing patent applications and for granting patents vary from one country or region to the other. ^[1]