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. 30, 1997
Filed:
Mar. 19, 1997
Applicant:
Inventors:
Makoto Sasaki, Yokohama, JP;
Hisatake Sato, Yokohama, JP;
Assignee:
Nippon Oil Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
252 6252 ; 252 6251 ; 252 6255 ; 252 6256 ; 252 74 ;
Abstract
A fluid having both magnetic and electrorheological characteristics, which comprises composite particles of ferromagnetic particles and a metallic oxide prepared by a sol-gel reaction of a metal alkoxide in the presence of the ferromagnetic particles and a solvent and a process for producing the same.