ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,521,257, issued on Jan. 13, was assigned to W. L. Gore & Associates Inc. (Newark, Del.).

"Low bleed implantable prosthesis with a taper" was invented by Marc A. Schlaud (Flagstaff, Ariz.) and Timothy T. Stringer (Flagstaff, Ariz.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A vascular graft having a sealing layer and a tapered length portion. The sealing layer provides the vascular graft with low bleed characteristics subsequent to a needle puncture such as with a dialysis needle or a suture needle. The sealing layer in the tapered length portion has varying wall thickness along the tapered length portion."

The patent was filed on March 9, 2023, unde...