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:
Sep. 24, 2002
Filed:
Apr. 28, 2000
Applicant:
Inventors:
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
C04B 3/5468 ;
U.S. Cl.
CPC ...
C04B 3/5468 ;
Abstract
Provided is a semiconductor ceramic and a semiconductor ceramic element each having a room temperature specific resistance of 3 &OHgr;·cm or lower and a resistance temperature characteristic of 9%/° C. or more. The semiconductor ceramic is characterized in that the ratio R /(R +R ), in which R is the transgranular resistance value of the crystal particles and R is the intergranular resistance value of the crystal particles and R +R is the overall resistance value representing the sum of R and R , is about 0.35 to 0.85.
Nabika, Yasuhiro. (2002). Semiconductor ceramic, semiconductor ceramic element and circuit protection element (U.S. Patent No. 6455454). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6455454
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