US Patent Issued to SUMITOMO ELECTRIC HARDMETAL on Aug. 12 for "Cutting tool" (Japanese Inventors)

ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,383,963, issued on Aug. 12, was assigned to SUMITOMO ELECTRIC HARDMETAL CORP. (Itami, Japan).

"Cutting tool" was invented by Hironari Moroguchi (Itami, Japan), Yuki Tsutsumiuchi (Itami, Japan), Nozomi Tsukihara (Itami, Japan), Akihiko Ueda (Itami, Japan) and Satoru Kukino (Itami, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A cutting tool comprises a substrate and a coating film disposed on the substrate, wherein the coating film comprises a first layer and a second layer; the first layer has a hardness H1 of 25 GPa or more and 40 GPa or less; the second layer has a hardness H2 satisfying 0.5xH1less than equal toH2less than equal to0.9xH1; and a...