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. 15, 2009
Filed:
May. 13, 2004
Katsuhiko Mori, Naka-gun, JP;
Ryoji Nakayama, Naka-gun, JP;
Hideaki Ono, Yokohama, JP;
Takae Ono, Legal Representative, Yokohama, JP;
Tetsurou Tayu, Yokosuka, JP;
Munekatsu Shimada, Tokyo, JP;
Makoto Kano, Yokohama, JP;
Yoshio Kawashita, Yokosuka, JP;
Katsuhiko Mori, Naka-gun, JP;
Ryoji Nakayama, Naka-gun, JP;
Hideaki Ono, Yokohama, JP;
Takae Ono, legal representative, Yokohama, JP;
Tetsurou Tayu, Yokosuka, JP;
Munekatsu Shimada, Tokyo, JP;
Makoto Kano, Yokohama, JP;
Yoshio Kawashita, Yokosuka, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
A rare earth magnet powder has a chemical composition which includes R: 5 to 20% (wherein, R represents one or two or more rare earth elements being inclusive of Y but exclusive of Dy and Tb), one or two of Dy and Tb: 0.01 to 10%, and B: 3 to 20%, with the balance comprising Fe and inevitable impurities; and an average particle diameter of 10 to 1,000 μm, wherein 70% or more of the entire surface of the rare earth magnet powder is covered with a layer being rich in the content of one or two of Dy and Tb and having a thickness of 0.05 to 50 μm.