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. 03, 2019
Filed:
Sep. 04, 2015
Applicant:
Tokin Corporation, Sendai-shi, Miyagi, JP;
Inventors:
Assignee:
TOKIN CORPORATION, Sendai-Shi, Miyagi, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/055 (2006.01); H01F 1/058 (2006.01); C22C 19/07 (2006.01); C22C 30/02 (2006.01); C22C 1/04 (2006.01); B22F 9/04 (2006.01);
U.S. Cl.
CPC ...
H01F 1/055 (2013.01); C22C 1/0433 (2013.01); C22C 19/07 (2013.01); C22C 30/02 (2013.01); H01F 1/0557 (2013.01); B22F 9/04 (2013.01); B22F 2998/10 (2013.01); C22C 1/0441 (2013.01);
Abstract
There is provided a rare earth-cobalt permanent magnet containing 23 to 27 wt % R, 3.5 to 5 wt % Cu, 18 to 25 wt % Fe, 1.5 to 3 wt % Zr, and a remainder Co with inevitable impurities, where an element R is a rare earth element at least containing Sm. It has a metal structure including a cell phase () containing SmCophase and a cell wall () surrounding the cell phase () and containing SmCophase.