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:
Feb. 20, 1990
Filed:
Jul. 28, 1989
Applicant:
Inventors:
Paul Bourrain, Dardilly, FR;
Gerard Collas, Caluire, FR;
Jean-Francois Rostaing, Vienne, FR;
Francois Sagi, Lyons, FR;
Assignee:
Rhone-Poulenc Sante, Courbevoie, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
528483 ; 528490 ; 528503 ; 526265 ;
Abstract
A basic copolymer of styrene with vinylpyridine is purified by extraction with supercritical carbon dioxide to remove residual monomers.