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:
Jan. 01, 1991
Filed:
Sep. 09, 1988
Applicant:
Inventors:
Koichi Tsuda, Kanagawa, JP;
Kazuo Mukae, Kanagawa, JP;
Toyoshige Sakaguchi, Kanagawa, JP;
Takashi Ishii, Kanagawa, JP;
Assignee:
Fuji Electric Co., Ltd., Kanagawa, JP;
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
264-6 ; 264 61 ; 264 66 ;
Abstract
A method of producing a voltage nonlinear ZnO varistor in which seed grains of ZnO are produced by spray drying a slurry of ZnO particles and then sintering the dried slurry to form seed grains having a size of 10 to 100.mu.m. The seed grains are mixed with a ZnO powder of particles of much smaller size than the seed grains and a small amount of an auxiliary component. The mixture is then molded and sintered to form the varistor element to which electrodes are attached.