(a)Revival on the basis of unintentional delay. If the delay in reply by applicant or patent owner was unintentional, a petition may be filed pursuant to this section to revive an abandoned application or a reexamination prosecution terminated under § 1.550(d) or § 1.957(b) or limited under § 1.957(c) . (b)Petition requirements. A grantable petition pursuant to this section must be accompanied by: (1) The reply required to the outstanding Office action or notice, unless previously filed; (2) The
(a)In general. Except for correspondence submitted via the U.S. Patent and Trademark Office (USPTO) patent electronic filing system in accordance with § 1.6(a)(4) , all correspondence intended for the USPTO must be addressed to either "Director of the United States Patent and Trademark Office, P.O. Box 1450, Alexandria, Virginia 22313-1450" or to specific areas within the Office as provided in this section. When appropriate, correspondence should also be marked for the attention of a particular office