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:
Jul. 03, 1990
Filed:
Sep. 21, 1988
Applicant:
Inventors:
Goran R Lindsten, Molndal, SE;
John E Wyman, Westford, MA (US);
Assignee:
SKF Nova AB, Gothenburg, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
252 6251 ;
Abstract
Superparamagnetic liquids comprising: (A) magnetic particles in stable colloidal suspension; (B) an A-X-B dispersant wherein A is derived from a non-ionic surface active agent, B is a carboxylic acid group and X is a connecting group between A and B; and (C) a carrier liquid which is a thermodynamically good solvent for A but which does not form a stable superparamagnetic liquid with magnetic particles coated only with oleic acid.