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:
Aug. 06, 1996
Filed:
Dec. 17, 1993
Applicant:
Inventors:
Torsten Groth, Reinbek, DE;
Winfried Joentgen, Koln, DE;
Hans W Linden, Odenthal, DE;
Nikolaus Muller, Monheim, DE;
Heinz-Joachim Rother, Krefeld, DE;
Paul Wagner, Dusseldorf, DE;
Martin Kugler, Leichlingen, DE;
Assignee:
Bayer AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528328 ; 528361 ; 528363 ; 528367 ; 525419 ; 525420 ; 525421 ; 525539 ;
Abstract
Polyaspartic acid is prepared by reacting maleic anhydride and ammonia to give maleamic acid, polymerizing the maleamic acid and subsequently hydrolyzing the product to give polyaspartic acid or a salt thereof.