Agri News, MN 05-29-07 Business news and notes ISU professors file suit against Monsanto DES MOINES -- Two Iowa State University professors have filed a lawsuit claiming Monsanto Co. infringed on their patent on a low-acid soybean. The lawsuit claims that the St. Louis-based company began their own soybean program based on the low-acid bean invented at Iowa State without "license or authority from" the university and "now licenses Iowa State's technology to others." The lawsuit said that Iowa State research foundation professors Walter Fehr and Earl Hammond have been awarded several U.S. patents related to soybeans with low linolenic acid. After the patents were issued, Monsanto began marketing the soybeans. Low linolenic acid is associated with lower trans fat levels in soybean oil, making it healthier. A telephone message left for a Monsanto spokeswoman was not immediately returned.