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:
Nov. 20, 1979
Filed:
Feb. 21, 1978
Kenji Fujimura, Hachiohji, JP;
Sumitomo Metal Mining Company Limited, Tokyo, JP;
Abstract
A method of manufacturing resistor paste having excellent voltage resistance properties, high resistivity and low TCR by fusing a mixture composed of 1 to 40 weight % of ruthenium dioxide, 40 to 85 weight % of lead oxide, 10 to 30 weight % of silica, 1 to 15 weight % of alumina and 0 to 5 weight % of another inorganic oxide at a temperature of 800.degree. to 1,200.degree. C., cooling and grinding the fused mixture, then adding a TCR modifier and an organic vehicle to the ground material, the TCR modifier being selected from the group consisting of 2 to 10 weight % ZrO.sub.2 ; 3 to 15 weight % of Al.sub.2 O.sub.3 ; 0.5 to 20 weight % of tin oxide and a mixture of 0.5 to 20 weight % of tin oxide and up to 15 weight % of Al.sub.2 O.sub.3, the sum of which does not exceed 25 weight % with respect to the total weight of the ground material and organic vehicle, and blending the admixture.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile