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:
Dec. 09, 2014
Filed:
Mar. 15, 2013
Applicant:
Toda Kogyo Corp., Otake-shi, Hiroshima-ken, JP;
Inventors:
Assignee:
Toda Kogyo Corporation, Otake-shi, Hiroshima-ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 7/02 (2006.01); H01F 1/00 (2006.01); H01F 1/057 (2006.01); H01F 1/01 (2006.01); H01F 41/00 (2006.01);
U.S. Cl.
CPC ...
H01F 7/02 (2013.01); H01F 1/0573 (2013.01); H01F 1/0578 (2013.01); H01F 1/01 (2013.01); H01F 41/005 (2013.01);
Abstract
R-T-B-based rare earth magnet particles are produced by an HDDR treatment which comprises a first stage HD step of heating particles of a raw material alloy having a composition of R, B and Co in an inert atmosphere or in a vacuum atmosphere and then replacing the atmosphere with a hydrogen-containing gas atmosphere in which the raw material alloy particles are held in the same temperature range and a second stage HD step of heating a material obtained in the first stage HD step in which the material is held in the hydrogen-containing gas atmosphere.