US Patent Issued to Fraunhofer-Gesellschaft zur forderung der angewandten Forschung on May 12 for "Phosphorus-containing cellulose esters, methods for their preparation, their use, and flame retardants" (German Inventors)

ALEXANDRIA, Va., May 12 -- United States Patent no. 12,624,125, issued on May 12, was assigned to Fraunhofer-Gesellschaft zur forderung der angewandten Forschung e.V. (Munich).

"Phosphorus-containing cellulose esters, methods for their preparation, their use, and flame retardants" was invented by Michael Ciesielski (Darmstadt, Germany), Elias Chalwatzis (Darmstadt, Germany), Robin Nezami (Darmstadt, Germany) and Benedikt Sperlich (Darmstadt, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to cellulose esters, the ester groups of which are at least partially containing phosphorus and are based on unsaturated carboxylic acids and reactive phosphorus components, wherein the latter a...