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:
Jun. 20, 2006
Filed:
Mar. 28, 2003
Applicants:
Shiro Tsuda, Asahi, JP;
Koji Nemoto, Asahi, JP;
Nobuharu Iijima, Choshi, JP;
Nobuaki Kurihara, Choshi, JP;
Inventors:
Shiro Tsuda, Asahi, JP;
Koji Nemoto, Asahi, JP;
Nobuharu Iijima, Choshi, JP;
Nobuaki Kurihara, Choshi, JP;
Assignee:
Ferrotec Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/44 (2006.01);
U.S. Cl.
CPC ...
Abstract
An element-modified ferrofluid comprising a base oil, a plurality of magnetic particles covered with at least one surfactant, and an elemental modifier. The elemental modifier is a metal, a metal mixture, an alloy, or a nonmetal.