Source: http://legalarium.com/cfr/64.html
Timestamp: 2019-04-21 16:06:05+00:00

Document:
(a) On the first or any subsequent reexamination or reconsideration the refusal of the registration or the insistence upon a requirement may be stated to be final, whereupon applicant's response is limited to an appeal, or to a compliance with any requirement, or to a petition to the Director if permitted by §2.63(b).
(b) During the period between a final action and expiration of the time for filing an appeal, the applicant may request the examiner to reconsider the final action. The request must be signed by the applicant, someone with legal authority to bind the applicant ( e.g. , a corporate officer or general partner of a partnership), or a practitioner qualified to practice under §11.14, in accordance with the requirements of §2.193(e)(2). The filing of a request for reconsideration will not extend the time for filing an appeal or petitioning the Director, but normally the examiner will reply to a request for reconsideration before the end of the six-month period if the request is filed within three months after the date of the final action. The Office will enter amendments accompanying requests for reconsideration after final action if the amendments comply with the rules of practice in trademark cases and the Act.
(1) If an applicant in an application under section 1(b) of the Act files an amendment to allege use under §2.76 during the six-month response period after issuance of a final action, the examiner shall examine the amendment. The filing of an amendment to allege use does not extend the deadline for filing a response to an outstanding Office action, appeal to the Trademark Trial and Appeal Board, or petition to the Director.
(2) If the amendment to allege use under §2.76 is acceptable in all respects, the applicant will be notified of its acceptance.
(3) If, as a result of the examination of the amendment to allege use under §2.76, the applicant is found not entitled to registration for any reason not previously stated, applicant will be notified and advised of the reasons and of any formal requirements or refusals. The Trademark Examining Attorney shall withdraw the final action previously issued and shall incorporate all unresolved refusals or requirements previously stated in the new non-final action.

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