ALEXANDRIA, Va., July 15 -- United States Patent no. 12,661,619, issued on June 23, was assigned to NOVAMEM AG (Schlieren, Switzerland).
"Solvent-free production of porous polymer structures" was invented by Christoph Ruedi Kellenberger (Zurich, Switzerland) and Michael Loepfe (Zurich, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for manufacturing of porous polymer structures, in particular membranes, the method comprising the steps of providing a mixture of one or more polymers and one or more salt nano- and/or microparticles, primary shaping said blend, and removing said one or more salt particles, wherein at least part of the one or more salt nano- and/or microparticles is one or mo...