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:
Oct. 24, 2023
Filed:
Sep. 19, 2022
Sumitomo Electric Industries, Ltd., Osaka, JP;
Sumitomo Electric Hardmetal Corp., Hyogo, JP;
Akito Ishii, Osaka, JP;
Katsumi Okamura, Osaka, JP;
Hisaya Hama, Hyogo, JP;
Yuh Ishida, Hyogo, JP;
Issei Nagashima, Hyogo, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
SUMITOMO ELECTRIC HARDMETAL CORP., Hyogo, JP;
Abstract
A cubic boron nitride sintered material includes: more than or equal to 80 volume % and less than or equal to 96 volume % of cubic boron nitride grains; and a binder, wherein the binder includes tungsten carbide, cobalt, and an aluminum compound, and Ha/Hb≥0.40 is satisfied, where Hb represents a hardness of the cubic boron nitride sintered material and Ha represents a hardness of the cubic boron nitride sintered material after performing acid treatment onto the cubic boron nitride sintered material to substantially remove the binder in the cubic boron nitride sintered material.