The issue of whether a method for treating a disease is a patentable invention is heading to the high court. In Mayo Collaborative Services v. Prometheus Laboratories, Mayo Clinic argues that Prometheus has a patent on treating digestive tract disease that is so broad it prevents researchers from continuing their work. Mayo researchers developed a test for administering thiopurine--a drug to treat inflammatory bowel disease and similar conditions--but were unable market it without violating the Prometheus patent, reports Forbes. The U.S. Supreme Court will hear arguments Wednesday. Article