37 C.F.R. § 42.3 : Patents, Trademarks, and Copyrights — UNITED STATES PATENT AND TRADEMARK OFFICE, DEPARTMENT OF COMMERCE — GENERAL PATENTS — TRIAL PRACTICE BEFORE THE PATENT TRIAL AND APPEAL BOARD — TRIAL PRACTICE AND PROCEDURE —GENERAL — Jurisdiction

(a) The Board may exercise exclusive jurisdiction within the Office over every involved application and patent during the proceeding, as the Board may order.
(b) A petition to institute a trial must be filed with the Board consistent with any time period required by statute.

37 C.F.R. §42.3