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. 21, 1987
Filed:
Jun. 23, 1986
Yasuhiro Okajima, Niihama, JP;
Yasuhiro Tsugita, Niihama, JP;
Tamaki Takechi, Saijyo, JP;
Syuji Okada, Mitoyo, JP;
Sumitomo Metal Mining Company Limited, Tokyo, JP;
Abstract
An alloy metal powder which contains rare earth metals and which has a uniform composition and contains a minimum of residual reducing agent and oxygen is produced by (1) preparing a mixture composed of (a) a powder of rare earth metal oxide, (b) a powder of a metal which is difficult to volatize at 900.degree. to 1300.degree. C., (c) at least one reducing agent selected from alkali metals, alkaline earth metals, and hydrides thereof, and (d) at least one chloride selected from alkali metal chlorides and alkaline earth metal chlorides, (2) heating the mixture in an inert gas atmosphere or under vacuum to provide a reaction mixture, and (3) treating the reaction mixture by a wet process.