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. 23, 1991
Filed:
Jun. 13, 1990
Applicant:
Inventors:
Assignee:
Rhone-Poulenc Chimie, Courbevoie Cedex, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F / ; C12N / ; C12N / ;
U.S. Cl.
CPC ...
252 6254 ; 428403 ; 428405 ; 435176 ; 435180 ; 435188 ;
Abstract
Magnetizable microspheres, optionally in aqueous dispersion, consisting of a matrix of at least one organopolysiloxane optionally bearing Si-vinyl groups or reactive and/or ionic units and magnetizable particles less than 300 angstroms in diameter encapsulated in the matrix. The magnetizable microspheres are prepared by homogenizing a solution of the organopolysiloxane and a magnetic fluid in the presence of water and a surfactant, removing the solvent for the organopolysiloxane and the carrier liquid of the magnetic fluid, and at least partially removing the water. The magnetizable microspheres are useful in biological applications as active supports.