Dow Chemical Co. said that an Oregon federal court judge has ruled in its favor in a patent lawsuit the chemicals company filed against Cargill Inc., the Associated Press reports. Cargill, the nation''s largest private company, charged in a lawsuit filed in the U.S. District Court for the District of Oregon that Dow infringed on four of its patents covering canola oils. Two of the patents were dismissed from the suit, but a jury later ruled that Cargill concealed important testing data from the U.S. Patent and Trademark Office while pursuing its patents. The court adopted the jury''s advisory verdict, and ruled that Cargill''s patents are unenforceable, Dow said in a statement. The subject of the lawsuit is Natreon canola oil, which contains no trans-fats and is healthier than using the partially hydrogenated oils now widely used by food companies and in restaurants, Dow said. The company said it plans to have over 500 million pounds of Natreon available by next fall.