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. 07, 2010
Filed:
Oct. 31, 2006
Applicants:
Shiro Sasaki, Tokyo, JP;
Hiroshi Hasegawa, Tokyo, JP;
Kenichiro Nakajima, Tokyo, JP;
Inventors:
Assignee:
Showa Denko K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F 1/00 (2006.01); H01F 1/01 (2006.01); H01F 1/032 (2006.01); H01F 1/04 (2006.01); H01F 1/047 (2006.01); H01F 1/053 (2006.01); H01F 1/055 (2006.01); H01F 1/057 (2006.01); H01F 1/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
An R-T-B type alloy (wherein R is at least one member selected from rare earth elements, T is a transition metal including Fe, and B includes boron) which is a raw material for use in a rare earth-based permanent magnet, wherein the volume percentage of the region containing an RTphase having an average grain diameter of 3 μm or less in the short axis direction is from 0.5 to 10%.