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:
Jul. 03, 1984
Filed:
Sep. 21, 1982
Akira Shibata, Yokohama, JP;
Chugai Denki Kogyo Kabushiki-Kaisha, Tokyo, JP;
Abstract
Internal oxidation method of Ag alloys for electrical contact materials and the like, in which vacant lattice points or voids which form paths of oxygen and oxidation nuclei in the course of internal oxidation, are produced innumerably and on an atomic scale by having the alloys absorbed with hydrogen, helium, nitrogen, or neutron, or by having the alloys subjected to a reduction atmosphere of a decreased pressure or to vacuum, respectively prior to the internal oxidation. In the course of internal oxidation, solute metals fill in the voids and precipitate as oxides at the innumerable oxide nuclei on an atomic scale, without diffusing about much but only to such extent that they reach most adjacent voids, and consequently without any segregation and depletion thereof.