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. 12, 2000
Filed:
May. 19, 1997
Applicant:
Inventors:
Toyohisa Fujita, Akita-shi, Akita, JP;
Kenji Yoshino, Aichi, JP;
Assignees:
Primary Examiner:
Int. Cl.
CPC ...
C10M / ; C10M / ; H01F / ;
U.S. Cl.
CPC ...
252572 ; 252 74 ; 252 6252 ; 252 6253 ; 252 6254 ;
Abstract
An electrorheological magnetic fluid including an electrically insulating liquid and fine particles dispersed therein is described, wherein the fine particles include a fine magnetic particle as a core, wherein the fine magnetic particle has a surface which is covered by an electroconductive substance, and the fine magnetic particle with its surface covered by the electroconductive substance is completely coated with a surfactant. A process for producing the electrorheological magnetic fluid is also described.