35 U.S.C. 251, Reissue of defective patents

Executive summary:

Revision by the AIA. The U.S. Patent Act was heavily revised by the America Invents Act. Revisions that alter this section of the Act can be seen in the revision page.

Source and Index. This document contains Section 251 ("Reissue of defective patents") of the U.S. Patent Act. This section was taken from the Eighth Edition, Eighth Revision of the MPEP (July 2010). This page was last updated in January 2011. You may return to the section index to find a particular section. Alternatively, you may search the Patent Act using the search box that appears on the left side of every page of BitLaw--you may restrict your search to Statutes on the search results page.

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35 U.S.C. 251 Reissue of defective patents.

Whenever any patent is, through error without any deceptive intention, deemed wholly or partly inoperative or invalid, by reason of a defective specification or drawing, or by reason of the patentee claiming more or less than he had a right to claim in the patent, the Director shall, on the surrender of such patent and the payment of the fee required by law, reissue the patent for the invention disclosed in the original patent, and in accordance with a new and amended application, for the unexpired part of the term of the original patent. No new matter shall be introduced into the application for reissue.

The Director may issue several reissued patents for distinct and separate parts of the thing patented, upon demand of the applicant, and upon payment of the required fee for a reissue for each of such reissued patents.

The provisions of this title relating to applications for patent shall be applicable to applications for reissue of a patent, except that application for reissue may be made and sworn to by the assignee of the entire interest if the application does not seek to enlarge the scope of the claims of the original patent.

No reissued patent shall be granted enlarging the scope of the claims of the original patent unless applied for within two years from the grant of the original patent.

(Amended Nov. 29, 1999, Public Law 106-113, sec. 1000(a)(9), 113 Stat. 1501A-582 (S. 1948 sec. 4732(a)(10)(A)).)