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:
Feb. 15, 2000
Filed:
Mar. 09, 1998
Applicant:
Inventors:
Tsutomu Okutomi, Kanagawa-ken, JP;
Atsushi Yamamoto, Tokyo, JP;
Tsuneyo Seki, Tokyo, JP;
Tadaaki Sekiguchi, Kanagawa-ken, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01B / ; H01B / ;
U.S. Cl.
CPC ...
252516 ; 252514 ; 252515 ; 252504 ; 420497 ; 420431 ; 419 18 ;
Abstract
The contacts material of the present invention is contacts material including silver-tungsten carbide alloy containing 55-70 weight % of tungsten carbide (WC) of mean particle size 0.1-6 .mu.m wherein is included 0.005-0.2 weight % of carbon in an undissolved state or non-compound state whose equivalent diameter is 0.01-5 .mu.m. The present invention enables the current interruption characteristics of contacts material to be improved.