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:
Jun. 29, 2021
Filed:
Jun. 18, 2019
Applicant:
Sumitomo Electric Hardmetal Corp., Itami, JP;
Inventors:
Tsutomu Hirano, Itami, JP;
Satoru Kukino, Itami, JP;
Assignee:
SUMITOMO ELECTRIC HARDMETAL CORP., Itami, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 35/5831 (2006.01); C01B 21/064 (2006.01); B23B 27/14 (2006.01); B23P 15/28 (2006.01);
U.S. Cl.
CPC ...
C01B 21/0648 (2013.01); B23B 27/14 (2013.01); B23P 15/28 (2013.01); C01B 21/064 (2013.01); C04B 35/5831 (2013.01); C01P 2002/60 (2013.01); C01P 2002/72 (2013.01); C01P 2002/76 (2013.01); C01P 2002/88 (2013.01); C01P 2004/03 (2013.01); C01P 2006/80 (2013.01); C01P 2006/90 (2013.01);
Abstract
The polycrystalline cubic boron nitride contains a cubic boron nitride at a content greater than or equal to 98.5% by volume, and has an area rate S1 of crystal grains, the crystal grains having an equivalent circle diameter greater than or equal to 1 μm, less than or equal to 20 area % at a cross section of the polycrystalline cubic boron nitride as observed with a scanning electron microscope at a magnification of 10,000.