The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 14, 2025
Filed:
Apr. 09, 2020
Sumitomo Electric Hardmetal Corp., Itami, JP;
Susumu Okuno, Itami, JP;
Yasuki Kido, Itami, JP;
Fumiyoshi Kobayashi, Itami, JP;
Anongsack Paseuth, Itami, JP;
SUMITOMO ELECTRIC HARDMETAL CORP., Itami, JP;
Abstract
Provided is a cutting tool including a base material and a coating layer provided on the base material, the coating layer including a titanium carbonitride layer provided on the base material, an intermediate layer provided on the titanium carbonitride layer in contact therewith, and an alumina layer provided on the intermediate layer in contact therewith, the intermediate layer being composed of a compound made of titanium, carbon, oxygen, and nitrogen, the intermediate layer having a thickness of more than 1 μm, when Patomic % represents an atomic ratio of the oxygen in an interface between the intermediate layer and the alumina layer, and Patomic % represents an atomic ratio of the oxygen at a point A away from the interface by 1 μm on a side of the intermediate layer, a ratio P/Pof the Pto the Pbeing more than or equal to 1.03.