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. 09, 1998
Filed:
Mar. 25, 1996
Moritaka Syouji, Hitachi, JP;
Tadashi Kitami, Hitachi, JP;
Seiichi Yamada, Jouuou-machi, JP;
Ken Takahashi, Tokai-mura, JP;
Shingo Shirakawa, Hitachi, JP;
Takeo Yamazaki, Hitachi, JP;
Shigeru Tanaka, Hitachi, JP;
Shigehisa Motowaki, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A ceramic resistor includes zinc oxide as a main component, and as essential components, aluminum oxide 3.0-40 mol %, magnesium oxide 2.0-40 mol %, silicon oxide 0.1-10 mol %, and at least one kind of compound 0.005-0.5 mol %, selected from a group consisting of calcium oxide, strontium oxide and barium oxide, and has a positive temperature coefficient of resistance. A neutral grounding resistor and a gas circuit breaker, each using the above-mentioned ceramic resistors, are disclosed.