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:
Jun. 11, 2021
Applicant:
Sumitomo Electric Hardmetal Corp., Hyogo, JP;
Inventors:
Assignee:
SUMITOMO ELECTRIC HARDMETAL CORP., Hyogo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 35/528 (2006.01); B24D 5/02 (2006.01); C04B 35/52 (2006.01);
U.S. Cl.
CPC ...
C04B 35/528 (2013.01); B24D 5/02 (2013.01); C04B 35/522 (2013.01); C04B 2235/425 (2013.01); C04B 2235/427 (2013.01); C04B 2235/725 (2013.01);
Abstract
A polycrystalline composite comprising diamond particles and non-diamond carbon, wherein: the sum of the content Vd of the diamond particles and the content Vg of the non-diamond carbon is more than 99% by volume based on the total volume of the polycrystalline composite; the median diameter d50 of the diamond particles is 10 nm or more and 200 nm or less; the dislocation density of the diamond particles is 1.0×10mor more and 1.0×10mor less; and the content Vd of the diamond particles and the content Vg of the non-diamond carbon satisfy the relationship represented by the formula 1:0.01<Vg/(Vd+Vg)≤0.5 Formula 1.