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:
Dec. 01, 2015
Filed:
Jan. 31, 2011
Applicants:
Kazutaka Watanabe, Shunan, JP;
Takehiko Yoneda, Shunan, JP;
Inventors:
Kazutaka Watanabe, Shunan, JP;
Takehiko Yoneda, Shunan, JP;
Assignee:
TOKUYAMA CORPORATION, Shunan-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 5/16 (2006.01); C01B 21/072 (2006.01);
U.S. Cl.
CPC ...
C01B 21/072 (2013.01); C01B 21/0726 (2013.01); C01P 2004/03 (2013.01); C01P 2004/32 (2013.01); C01P 2004/61 (2013.01); C01P 2006/12 (2013.01); C01P 2006/14 (2013.01); C01P 2006/16 (2013.01); C01P 2006/21 (2013.01); C01P 2006/32 (2013.01); Y10T 428/2982 (2015.01);
Abstract
To provide a process capable of efficiently producing a spherical aluminum nitride powder having a size most suited for use as a filler, and having a high sphericalness and a large particle strength. A spherical aluminum nitride powder is produced by using a spherical granulated product of an alumina powder or an alumina hydrate powder as a starting material, and feeding the spherical granulated product to the step of reductive nitrogenation so as to be reductively nitrogenated.