(a)Scope. A patent owner may file a single response to the petition and/or decision on institution. A patent owner response is filed as an opposition and is subject to the page limits provided in § 42.24 . (b)Due date for response. If no time for filing a patent owner response to a petition is provided in a Board order, the default date for filing a patent owner response is three months from the date the inter partes review was instituted. 37 C.F.R. §42.120 77 FR 48727 , Aug. 14, 2012, as amended

After the Board issues a final written decision in an inter partes review, post-grant review, or covered business method patent review and the time for appeal has expired or any appeal has terminated, the Office will issue and publish a certificate canceling any claim of the patent finally determined to be unpatentable, confirming any claim of the patent determined to be patentable, and incorporating in the patent any new or amended claim determined to be patentable by operation of the certificate