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:
Sep. 30, 2025
Filed:
Dec. 07, 2020
Applicant:
Tokuyama Corporation, Shunan, JP;
Inventors:
Shota Daiki, Shunan, JP;
Yuuki Hirozane, Shunan, JP;
Assignee:
TOKUYAMA CORPORATION, Shunan, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B 21/064 (2006.01);
U.S. Cl.
CPC ...
C01B 21/0648 (2013.01); C01P 2002/77 (2013.01); C01P 2004/61 (2013.01); C01P 2006/80 (2013.01);
Abstract
The present invention provides a hexagonal boron nitride powder that has a highly reduced content of magnetic foreign bodies and is excellent in electrical insulation, and a production method capable of producing the hexagonal boron nitride powder at low cost. The hexagonal boron nitride powder includes single particles and/or aggregated particles of hexagonal boron nitride and has a total content of Co, Cr, Cu, Fe, Mg, Mn, Ni, Ti, Zn, and Al of not more than 20 ppm. The method for producing the hexagonal boron nitride powder with a reduced content of magnetic foreign bodies includes a plurality of specific steps.