Bayer AG announced (in a press release) that it would appeal against an unfavorable U.S. court ruling in a patent dispute over one of its major products, the oral contraceptive Yasmin. Bayer said it filed a notice of appeal with the U.S. District Court in New Jersey against the March 3 opinion and order. In a statement, Bayer said that a district judge found that certain claims of Bayer Schering's U.S. patent were invalid. Bayer said the decision came after it sued Barr Laboratories for patent infringement in connection with its application for U.S. approval to market a generic version of Yasmin. The German company said the Federal Circuit would hear its appeal. The ip pharm doc has earlier reported on Yasmin litigation here