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:
Oct. 26, 1982
Filed:
Sep. 15, 1980
Applicant:
Inventor:
Mark S Chagnon, Lowell, MA (US);
Assignee:
Ferrofluidics Corporation, Nashua, NH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09D / ; C10M / ;
U.S. Cl.
CPC ...
252 6251 ; 252 6253 ; 252 496 ; 252309 ; 252572 ;
Abstract
A stable liquid composition which comprises a colloidal dispersion of finely-divided particles in a liquid silicone-oil carrier and a dispersing amount of a surfactant, which surfactant comprises a silicone-oil surfactant containing a functional group which forms a chemical bond with the surface of the particles and a tail group which is soluble in the silicone-oil carrier, to provide a stable ferrofluid composition.