ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,397, issued on Nov. 18, was assigned to Covestro Intellectual Property GmbH & Co. KG (Leverkusen, Germany).

"Polyester carbonates from aliphatic diacids and aliphatic diols, and process for the production thereof" was invented by Alexander Meyer (Dusseldorf, Germany), Jan Heijl (Lokeren, Belgium), Helmut Werner Heuer (Siegen, Germany) and Annabelle Bertin (Antwerp, Belgium).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a process for preparing a polyester carbonate on the basis of aliphatic diacids and aliphatic diols and to the polyester carbonate prepared according to the process and to a moulding mass and moulding ...