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. 23, 2014
Filed:
Dec. 11, 2008
Takashi Kawano, Chiba, JP;
Noriko Makiishi, Chiba, JP;
Tatsuhiko Hiratani, Kurashiki, JP;
Naomichi Nakamura, Chiba, JP;
Yusuke Oishi, Nagoya, JP;
Eisuke Hoshina, Toyota, JP;
Toshiya Yamaguchi, Nishikamo-gun, JP;
Daisuke Okamoto, Toyota, JP;
Takeshi Hattori, Aichi-gun, JP;
Takashi Kawano, Chiba, JP;
Noriko Makiishi, Chiba, JP;
Tatsuhiko Hiratani, Kurashiki, JP;
Naomichi Nakamura, Chiba, JP;
Yusuke Oishi, Nagoya, JP;
Eisuke Hoshina, Toyota, JP;
Toshiya Yamaguchi, Nishikamo-gun, JP;
Daisuke Okamoto, Toyota, JP;
Takeshi Hattori, Aichi-gun, JP;
JFE Steel Corporation, Tokyo, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An iron powder for dust cores is provided which can be formed into a dust core having a high resistivity and having a low iron loss without degrading the mechanical strength. The iron powder for dust cores includes an iron powder and an oxide film on the surface thereof, wherein the oxide film is composed of a Si-based oxide in which the ratio of Si to Fe satisfies Si/Fe≧0.8 on an atomic number basis.