US Patent Issued to Envision Biomedical on July 29 for "Dual-phase zwitterionic monomers" (New York, Pennsylvania Inventors)

ALEXANDRIA, Va., July 30 -- United States Patent no. 12,371,519, issued on July 29, was assigned to Envision Biomedical LLC (York, Pa.).

"Dual-phase zwitterionic monomers" was invented by Jay Friedrich Kunzler (Webster, N.Y.) and Siddhesh Pawar (Lancaster, Pa.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Hydrogel materials used in the manufacture of biocompatible medical devices, for example, hydrogel materials having desirable physical properties for use as a contact lens. A composition contains at least one vinyl containing monomer, a methacrylate(acrylate) monomer, methacrylate (acrylate) prepolymers, crosslinking agents and monomers having the structure as shown in Formula 1:where R1 is a vinyl functio...