ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,137, issued on March 25, was assigned to SOFRADIM PRODUCTION (Trevoux, France) and Convidien LP (Mansfield, Mass.).

"Synthetic prosthesis comprising a knit and a non porous film and method for forming same" was invented by Julie Lecuivre (Jassans-Riottier, France), Nicolas Prost (Orlienas, France), Nicholas Maiorino (Branford, Conn.), Matthew Prescott (North Haven, Conn.) and Thomas Corso (West Haven, Conn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a synthetic prosthesis for tissue reinforcement comprising: a porous knit made from a monofilament of a synthetic biocompatible material, said knit defining two oppo...