ALEXANDRIA, Va., March 24 -- United States Patent no. 12,583,977, issued on March 24, was assigned to SANYO CHEMICAL INDUSTRIES LTD. (Kyoto, Japan).

"Block polymer, thermoplastic resin composition and molded article" was invented by Shintaro Higuchi (Kyoto, Japan) and Satoru Teranishi (Kyoto, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a block polymer (X) containing, as structural units, a polyolefin structure derived from a polyolefin (A) below and a polyolefin structure derived from a polyolefin (B) below. The polyolefin (A) contains a C3-C8 Alpha-olefin as a structural monomer with Alpha-olefin portions having an isotacticity of 70 to 100%, has a number average molecular weight of 100...