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. 30, 1992
Filed:
Apr. 18, 1990
Applicant:
Inventors:
Koichi Uchino, Omuta, JP;
Yukihiko Nakajima, Omuta, JP;
Myuki Nakamura, Omuta, JP;
Hideki Hirotsuru, Omuta, JP;
Assignee:
Denki Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ; C04B / ;
U.S. Cl.
CPC ...
501 97 ; 501 94 ; 501 96 ; 501 98 ; 501154 ; 423344 ;
Abstract
A silicon nitride powder prepared by nitriding a metallic silicon powder and having the following physical characteristics (1) to (3):