Reissue

The issue of a patent that was issued previously in order to correct an error in the patent. MPEP 1401, MPEP 1402.

An application filed by a patentee after a patent has issued to correct applicant's errors that rendered the patent wholly or partly inoperative due to a defective specification or drawings or which claimed more or less than the applicant had a right to claim. The applicant must provisionally surrender the previously issued patent. Any reissue patent that results will have the same expiration date as the original patent.