37 CFR 1.981
Reopening after a final decision of the Board of Patent Appeals and Interferences.

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§1.981 Reopening after a final decision of the Board of Patent Appeals and Interferences.

When a decision by the Board of Patent Appeals and Interferences on appeal has become final for judicial review, prosecution of the inter partes reexamination proceeding will not be reopened or reconsidered by the primary examiner except under the provisions of § 41.77 of this title without the written authority of the Director, and then only for the consideration of matters not already adjudicated, sufficient cause being shown.