US Patent Issued to GEBRUDER DORFNER GMBH & Co. KAOLIN-UND KRISTALLQUARZSAND-WERKE on Nov. 11 for "Lightweight composite material having a scratch-resistant surface and method for the production thereof" (German Inventors)

ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,466,768, issued on Nov. 11, was assigned to GEBRUDER DORFNER GMBH & Co. KAOLIN-UND KRISTALLQUARZSAND-WERKE KG (Hirschau, Germany).

"Lightweight composite material having a scratch-resistant surface and method for the production thereof" was invented by Klaus Holtmann (Amberg, Germany), Marco Suss (Bodenwohr, Germany) and Kirstin Heyen (Hahnbach, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a lightweight composite material having a binder and at least one first and at least one second filler, the first filler having a density of less than2 kg/l and a Mohs hardness of less than4 and the second filler having a bul...