(a) Except as provided for in §1.907 and in paragraph (b) of this section, any person other than the patent owner or its privies may, at any time during the period of enforceability of a patent which issued from an original application filed in the United States on or after November 29, 1999, file a request for inter partes reexamination by the Office of any claim of the patent on the basis of prior art patents or printed publications cited under §1.501.

(b) Any request for an inter partes reexamination submitted on or after September 16, 2012, will not be accorded a filing date, and any such request will not be granted.

[76 FR 59057, Sept. 23, 2011]