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, 1987
Filed:
Oct. 28, 1985
Applicant:
Inventor:
Akira Shibata, Yokohama, JP;
Assignee:
Chugai Denki Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
428673 ; 148431 ; 428929 ;
Abstract
Electrical contact materials made from Ag-Sn-In system alloys which have been internally oxidized. A substratum or base part of the materials is internally oxidized after having been clad with a thin layer of alloys of the same alloy system, concentration of solute elements of which is, however, smaller than that of the substratum alloys, so that no segregation of the solute metal elements shall be produced within the substratum alloys. Electrical contact resistance and consequent temperature raise of the internally oxidized materials under operation are considerably lowered.