ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,577, issued on Dec. 30, was assigned to Borealis AG (Vienna).

"Heterophasic propylene polymer composition with improved property profile" was invented by Jingbo Wang (Linz, Austria), Markus Gahleitner (Linz, Austria), Klaus Bernreitner (Linz, Austria), Pauli Leskinen (Porvoo, Finland) and Peter Niedersuess (Linz, Austria).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a heterophasic polypropylene composition with an improved property profile, e.g. improved balance of toughness, softness and haze, comprising a heterophasic propylene copolymer and a copolymer of propylene and 1-hexene."

The patent was filed on Sept. 18...