In United States patent law, a reexamination's a process whereby a third party or inventor can have a patent reexamined by a patent examiner to verify that the subject matter it claims's patentable. In order to have a patent reexamined, the party of interest must submit prior art that raises a "substantial new question of patentability". Process A request for a reexamination can be filed by anyone at anytime during the period of enforceability of a patent. In order to request a reexamination, on… (More on Reexamination)