(a)Appeal from final refusal of application. After final refusal by the trademark examining attorney, an applicant may appeal to the Trademark Trial and Appeal Board, upon payment of the prescribed fee for each class in the application for which an appeal is taken, within the time provided in § 2.142(a)(1) . A second refusal on the same grounds may be considered as final by the applicant for the purpose of appeal. (b)Appeal from expungement or reexamination proceeding. After issuance of a final Office