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. 21, 2015
Filed:
Mar. 25, 2013
Applicant:
Ube Industries, Ltd., Ube-shi, JP;
Inventors:
Koji Shibata, Ube, JP;
Takuji Ohmaru, Ube, JP;
Takeshi Yamao, Ube, JP;
Masataka Fujinaga, Ube, JP;
Michio Honda, Ube, JP;
Takayuki Fujii, Ube, JP;
Assignee:
Ube Industries, Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 33/06 (2006.01); C01B 21/068 (2006.01); C04B 35/593 (2006.01);
U.S. Cl.
CPC ...
C01B 21/0687 (2013.01); C01B 21/068 (2013.01); C04B 35/5935 (2013.01); C01P 2006/12 (2013.01); C01P 2006/80 (2013.01); C04B 2235/3206 (2013.01); C04B 2235/3225 (2013.01); C04B 2235/5409 (2013.01); C04B 2235/723 (2013.01); C04B 2235/77 (2013.01); C04B 2235/96 (2013.01);
Abstract
A method of producing a silicon nitride powder includes heating an amorphous Si—N(—H)-based compound in which assuming that the specific surface area is RS (m/g) and the oxygen content ratio is RO (mass %), RS/RO is 500 or more, at a temperature rising rate of 12 to 100° C./min in a temperature range from 1,000 to 1,400° C. while flowing the compound by a continuous firing furnace.