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:
Sep. 18, 1984
Filed:
May. 20, 1982
Applicant:
Inventor:
Akira Shibata, Yokohama, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
148 203 ; 148431 ;
Abstract
Rather high temperature raise of internally oxidized Ag-Sn alloy contact materials due to a high contact resistance inherent to such materials, is eliminated. The high contact resistance which is caused by high concentration or supersaturation of metal oxides including tin oxides about contact surfaces, is avoided by having solute metals sublimated, reduced or extracted about the contact surface before the internal oxidation thereof. Sublimation and other treatments may be made after having the materials subjected to internal oxidation.