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:
May. 24, 2022
Filed:
Apr. 21, 2020
Applicant:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Inventors:
Masato Michiuchi, Osaka, JP;
Takamasa Onoki, Osaka, JP;
Katsumi Okamura, Osaka, JP;
Takayuki Fudo, Toyama, JP;
Takehiko Hayashi, Toyama, JP;
Assignee:
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 35/56 (2006.01);
U.S. Cl.
CPC ...
C04B 35/5626 (2013.01); C04B 2235/3847 (2013.01); C04B 2235/785 (2013.01); C04B 2235/85 (2013.01);
Abstract
A tungsten carbide powderincludes bonded bodieseach including a plurality of tungsten carbide crystal grains, in which the bonded bodiesinclude, at a grain boundarybetween the plurality of tungsten carbide crystal grains, a chromium-concentrated regionwhich has a chromium concentration higher than that in the tungsten carbide crystal grains