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. 20, 1993
Filed:
Dec. 11, 1991
Applicant:
Inventors:
Hanns-Ingolf Paul, Cologne, DE;
Rolf Treckmann, Cologne, DE;
Gunther Weymans, Leverkusen, DE;
Jurgen Kirsch, Leverkusen, DE;
Jurgen Heuser, Krefeld, DE;
Klaus Elgeti, Bergisch Gladbach, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen Bayerwerk, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528483 ; 528480 ; 528491 ; 528497 ;
Abstract
A process for isolating polymers from their solvents by addition of fluids containing carbon dioxide at temperatures of 30.degree. to 280.degree. C. and under pressures of 1 to 1,000 bar is disclosed. The process is characterized in that the concentration of the polymers in their solvents is between 5% and 80% by weight and the fluid containing carbon dioxide consists of at least 50% by weight carbon dioxide.