ALEXANDRIA, Va., July 14 -- United States Patent no. 12,679,921, issued on July 14, was assigned to CARL FREUDENBERG KG (Weinheim, Germany).

"Cross-linked aliphatic polyketones" was invented by Thomas Schauber (Weinheim, Germany), Marco Sutter (Weinheim, Germany), Bjoern Hellbach (Birkenau, Germany), Patrick Heyer (Oberhausen Rheinhausen, Germany), Kira Truxius (Darmstadt, Germany), Tina Andrae (Mannheim, Germany) and Arthur Lanziner (Heidelberg, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A molding comprising a matrix from the crosslinking of an aliphatic polyketone with at least one diamine source as crosslinker with formation of imine groups, or a polymer mixture comprising at least one polyket...