Federal Circuit holds that reissue application of hemodialysis shunt patent impermissibly recaptured surrendered subject matter
The Federal Circuit, in a nonprecedential decision, held that claims of a reissue application were properly rejected because they recaptured subject matter surrendered during the original prosecution of U.S. Patent No. 8,282,591 (“the ’591 patent”).
The ’591 patent is directed to an arteriovenous shunt that connects a graft to an artery and passes returned blood through a “single lumen venous outflow catheter” into the right atrium of a patient’s heart. This system reduces the risk of infection, clotting, and hyperplasia compared to systems that remove and return blood through a graft connected to a vein.