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:
Aug. 28, 1990
Filed:
Oct. 16, 1989
Applicant:
Inventors:
Yukio Kawaguchi, Chiba, JP;
Tohru Kineri, Chiba, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01C / ;
U.S. Cl.
CPC ...
338 / ; 264 61 ; 252516 ;
Abstract
A thermistor material comprising, in sintered form, (A) a matrix comprising aluminum oxide, silicon oxide, or the oxide of an element belonging to Group 2A in the Periodic Table, and (B) a conductive path forming substance comprising silicon carbide and/or boron carbide, wherein the volume ratio of silicon carbide to the matrix is up to about 1.24 is stable at elevated temperatures of 400.degree.-800.degree. C.