In United States patent law, a reexamination is 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 is patentable. To have a patent reexamined, an interested party 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. To request a reexamination, one must submit a &#… (More on Reexamination)