US Patent Issued to SUMITOMO ELECTRIC HARDMETAL on May 26 for "Cutting tool" (Japanese Inventors)

ALEXANDRIA, Va., May 26 -- United States Patent no. 12,637,755, issued on May 26, was assigned to SUMITOMO ELECTRIC HARDMETAL CORP. (Itami, Japan).

"Cutting tool" was invented by Kihiro Momotani (Itami, Japan), Yuta Suzuki (Itami, Japan) and Daiji Tabayashi (Itami, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A cutting tool includes: a substrate; and a coating film including a first layer and a second layer, the first layer consists of a multilayer structure consisting of a first unit layer composed of TiaAl1-a-bBbN, and the second unit layer composed of TiN, where 0.30less than equal toaless than equal to0.50 and 0.005less than equal tobless than equal to0.10, the second layer is composed of TiCxN1-...