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:
Oct. 03, 1989
Filed:
Jan. 07, 1988
Applicant:
Inventors:
Issei Hayakawa, Nagoya, JP;
Noriyuki Ukai, Nagoya, JP;
Assignee:
NGK Insulators, LTD., Nagoya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
501 97 ; 501 98 ;
Abstract
A homogeneous silicon nitride sintered body produced by placing a shaped body of silicon nitride powder into a high density silicon carbide sagger having particular properties and then firing under particular conditions.