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. 31, 1982
Filed:
Feb. 17, 1981
Applicant:
Inventor:
Daniel J Swart, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528271 ; 528274 ;
Abstract
Linear polyesters are produced by esterification of aromatic dicarboxylic acids with cyclic alkylene carbonates in the presence of organic compounds containing at least one six-membered aromatic nitrogen-containing heterocyclic moiety followed by polycondensation of the resulting low molecular weight ester.