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:
Jul. 28, 2026
Filed:
Mar. 15, 2022
Sumitomo Electric Industries, Ltd., Osaka, JP;
Yasuki Kido, Osaka, JP;
Katsumi Okamura, Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
A cemented carbide includes a tungsten carbide grain and a binder phase, wherein the cemented carbide includes 80 volume % or more of the tungsten carbide grain and the binder phase in total, the cemented carbide includes 0.1 volume % or more and 20 volume % or less of the binder phase, the tungsten carbide grain is composed of a first region and a second region, each of the first region and the second region includes a first metal element, the first metal element is at least one selected from a group consisting of titanium, niobium, and tantalum, a ratio R1 is 0.70 time or more and less than 1.30 times as large as a ratio R2, the R2 is 2.0% or more and 10.0% or less, and the binder phase includes cobalt.