ALEXANDRIA, Va., July 28 -- United States Patent no. 12,692,663, issued on July 28, was assigned to Schaeffler Technologies AG & Co. KG (Herzogenaurach, Germany).
"Method for producing wet-running friction paper" was invented by Stefan Steinmetz (Essingen, Germany) and Gregor Mattern (Schoneberg, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method is for producing a wet-running friction paper, at least containing a fiber fraction consisting of at least one type of fiber, a fraction of at least one filler, and a fraction of a binder based on phenol resin. The fiber fraction, the filler fraction and the binder dissolved as a phenolate solution are processed together in a paper production process to...