U.S. Patent Act
..Part II. Patentabililty of Inventions and Grant of Patents
....Chapt. 13. Review of Patent and Trademark Office
With respect to an appeal described in section 142 of this title [35 USCS Sect. 142], the Commissioner shall transmit to the United States Court of Appeals for the Federal Circuit a certified list of the documents comprising the record in the Patent and Trademark Office. The court may request that the Commissioner forward the original or certified copies of such documents during pendency of the appeal. In an ex parte case, the Commissioner shall submit to the court in writing the grounds for the decision of the Patent and Trademark Office, addressing all the issues involved in the appeal. The court shall, before hearing an appeal, give notice of the time and place of the hearing to the Commissioner and the parties in the appeal.