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:
May. 23, 1989
Filed:
Jul. 12, 1988
Applicant:
Inventors:
Lutz Hoppe, Walsrode, DE;
Helmut Huhn, Walsrode, DE;
Werner Karstens, Bomlitz, DE;
Eugen Reinhardt, Walsrode, DE;
Assignee:
Wolff Walsrode AG, Walsrode, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
524828 ; 5253291 ; 5253292 ; 525387 ;
Abstract
Process for the preparation of aqueous solutions of hydrolysed styrene/acrylonitrile copolymers, the carboxyl groups of which are entirely or partly present as NH.sub.4 and/or alkali metal salt, characterized in that