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:
Feb. 25, 1992
Filed:
Jul. 30, 1990
Applicant:
Inventors:
Dirk Leistner, Dresden, DD;
Frank Bohme, Dresden, DD;
Doris Pospiech, Dresden, DD;
Manfred Ratzsch, Dresden, DD;
Christian Vieth, Karl-Marx-Stad, DD;
Michael Stephan, Dresden, DD;
Assignee:
Akademie der Wissenschaften der DDR, Berlin, DD;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 45 ; 528 48 ; 528 74 ; 528 80 ; 528 83 ;
Abstract
The invention relates to new aromatic/aliphatic and/or alicyclic copolyester amides with high molecular weights, without crosslinking. A subsequent solid phase condensation is avoided or is greatly limited in time. The occurrence of thermal decomposition reactions, dark discolorations of the polymers as well as the formation of block structures are avoided.