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:
Aug. 26, 1986
Filed:
Jul. 30, 1985
Applicant:
Inventors:
Katsuhiko Wakayama, Tokyo, JP;
Hiraku Harada, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
252 6252 ; 252 6251 ; 252 6255 ;
Abstract
A magnetic fluid comprising metal fine particles of cobalt, 25 to 60% based on the weight of the metal particles of a surface-active agent selected from the group consisting of polyglycerine fatty acid esters, sorbitan fatty acid esters, and mixtures thereof, and 50 to 250% based on the weight of the metal particles of a low boiling hydrocarbon medium exhibits remarkably high saturation magnetization.