Federal Circuit Upholds USPTO’s Jepson Claim Rejection in Xencor Patent Case

The Federal Circuit has decided not to reevaluate the U.S. Patent and Trademark Office’s decision concerning Xencor Inc.’s patent application for an antibody. The application utilized the Jepson claim format, a method specifying improvements over prior inventions. However, the application was ultimately rejected. The case sheds light on the intricacies and challenges associated with the Jepson claim format in patent applications. For additional details on this case, more information can be found in an article on Law360.