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:
Nov. 29, 2022
Filed:
Jun. 27, 2017
Applicant:
Covestro Deutschland Ag, Leverkusen, DE;
Inventors:
Hans Georg Grablowitz, Cologne, DE;
Alfred Zastrow, Dormagen, DE;
Olaf Fleck, Bergisch-Gladbach, DE;
Assignee:
COVESTRO DEUTSCHLAND AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 3/10 (2006.01); C08G 18/32 (2006.01); C08G 18/10 (2006.01); C08G 18/82 (2006.01); C07C 243/16 (2006.01); C08G 71/04 (2006.01);
U.S. Cl.
CPC ...
B01D 3/10 (2013.01); C08G 18/10 (2013.01); C08G 18/3231 (2013.01); C08G 18/82 (2013.01); C07C 243/16 (2013.01); C08G 71/04 (2013.01);
Abstract
The present invention relates to a process for removing ketazine from polyurethane dispersions by means of distillation below the boiling point of ketazine.