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:
Apr. 25, 1978
Filed:
May. 02, 1977
Applicant:
Inventors:
Joachim Stedefeder, Lampertheim, DT;
Ingo H Dorn, Dannstadt-Schauernheim, DT;
Horst Kuhn, Otterstadt, DT;
Walter Kastenhuber, Hoeningen, DT;
Wolfgang Linke, Ludwigshafen, DT;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
528499 ; 260 / ; 526 53 ;
Abstract
Copolymers of crotonic acid are purified, to remove monomeric crotonic acid, by extracting the copolymers with water at from 50.degree. to 120.degree. C and stirring the system, the flow energy of the water and the energy of stirring being chosen so that the polymer particles just remain suspended.