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:
Aug. 30, 2022
Filed:
Jul. 20, 2018
Applicant:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Inventors:
Hitoshi Sumiya, Osaka, JP;
Katsuko Yamamoto, Osaka, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C30B 29/04 (2006.01); B23B 27/20 (2006.01); B23C 5/16 (2006.01);
U.S. Cl.
CPC ...
C30B 29/04 (2013.01); B23B 27/20 (2013.01); B23C 5/16 (2013.01);
Abstract
In a diamond polycrystal, a value of a ratio (d'/d) of d′ to d is less than or equal to 0.98 in a Vickers hardness test performed under a condition defined in JIS Z 2244:2009, where the d represents a length of a diagonal line of a first Vickers indentation formed in a surface of the diamond polycrystal when a Vickers indenter with a test load of 4.9 N is pressed onto the surface of the diamond polycrystal, and the d′ represents a length of a diagonal line of a second Vickers indentation remaining in the surface of the diamond polycrystal after releasing the test load.