35 U.S.C. § 142 - U.S. Code - Unannotated Title 35. Patents § 142. Notice of appeal

When an appeal is taken to the United States Court of Appeals for the Federal Circuit, the appellant shall file in the Patent and Trademark Office a written notice of appeal directed to the Director, within such time after the date of the decision from which the appeal is taken as the Director prescribes, but in no case less than 60 days after that date.