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. 25, 1977
Filed:
Jul. 11, 1975
Applicant:
Inventors:
Shigetaka Wada, Kuwana, JA;
Senji Atsumi, Nagoya, JA;
Assignee:
NGK Insulators, Ltd., Nagoya, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ;
U.S. Cl.
CPC ...
106 7332 ; 106 7331 ; 252 635 ; 252520 ;
Abstract
A ceramic is disclosed which maintains a high electric resistance over a wide temperature range and has a large temperature coefficient of resistance variation at temperatures just below the aforesaid range, the PTC ceramic consisting essentially of