HORSHAM, Pa.--(BUSINESS WIRE)--Nucleonics, Inc., a privately held biotechnology company focused on the development of novel RNA interference based therapeutics, today filed in the U.S. Court of Appeals for the Federal Circuit a petition for rehearing en banc of an appeal decided by a three-judge panel on July 20, 2007, Benitec Australia, LTD v. Nucleonics, Inc. [Case No. 06-1122 (opinion by Whyte, District Judge; Dissenting Opinion by Circuit Judge Dyk)].