ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,440,901, issued on Oct. 14, was assigned to SUMITOMO ELECTRIC INDUSTRIES LTD. (Osaka, Japan).
"Cutting tool" was invented by Nozomi Tsukihara (Osaka, Japan) and Haruyo Fukui (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cutting tool, comprising a substrate and a coating disposed on the substrate, wherein the coating comprises a first layer, the first layer consists of an alternate layer in which a first unit layer and a second unit layer are alternately stacked, the first unit layer is composed of AlaTi(1-a-b)SibN, the second unit layer is composed of AlcCr(1-c-d)CudN, the a, the b, the c, and the d satisfy 0.50less than equal toaless t...