A U.S. court of appeals ruling dashed the hopes of potentially hundreds of post-Hurricane Katrina claimants Tuesday when it ruled a major insurer’s policy language unambiguous. The case is based on State Farm Fire and Casualty Co.’s refusal to pay Long Beach, Miss., claimants John and Claire Tuepker for the complete destruction of their home and property caused by Hurricane Katrina in August 2005. The couple had a current and valid homeowners’ insurance policy with State Farm at the time.