ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,740, issued on May 27, was assigned to KURARAY Co. LTD. (Kurashiki, Japan).
"Grain-finished leather-like sheet" was invented by Masato Warita (Okayama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A grain-finished leather-like sheet includes: a fiber base material; a polyurethane skin layer bonded to one surface of the fiber base material; and a polyurethane adhesion layer that bonds the fiber base material and the polyurethane skin layer to each other. The polyurethane adhesion layer includes an aqueous polyurethane as a main component and contains 0.01 to 0.45 mass % in sulfur atoms content, of a sulfate or an alkyl sulfate. The polyuretha...