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. 30, 2017
Filed:
May. 07, 2015
Applicant:
Sumitomo Electric Industries, Ltd., Osaka-shi, JP;
Inventors:
Assignee:
Sumitomo Electric Industries, Ltd., Osaka-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09K 3/14 (2006.01); C01B 31/06 (2006.01); B24D 3/00 (2006.01); B24D 18/00 (2006.01); C04B 35/52 (2006.01); C04B 35/645 (2006.01);
U.S. Cl.
CPC ...
C01B 31/06 (2013.01); B24D 3/008 (2013.01); B24D 18/0009 (2013.01); C04B 35/52 (2013.01); C04B 35/645 (2013.01); C04B 2235/425 (2013.01); C04B 2235/427 (2013.01); C04B 2235/5445 (2013.01); C04B 2235/656 (2013.01); C04B 2235/76 (2013.01); C04B 2235/785 (2013.01); C04B 2235/96 (2013.01);
Abstract
A polycrystalline diamond body contains diamond particles. The diamond particles have a mean particle size of 50 nm or less. As a result of measurement of a knoop hardness under a test load of 4.9 N at 23° C.±5° C., the polycrystalline diamond body has a ratio of a length B of a shorter diagonal line with respect to a length A of a longer diagonal line of diagonal lines of a knoop indentation, expressed as a B/A ratio, of 0.080 or less. This polycrystalline diamond body is tough and has a small particle size.