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:
Dec. 19, 1978
Filed:
Oct. 21, 1977
Applicant:
Inventor:
John E Kochanowski, Hinsdale, MA (US);
Assignee:
General Electric, Pittsfield, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528197 ; 260860 ; 528202 ;
Abstract
A novel process is disclosed for the preparation of polyester carbonates containing both carboxylate and carbonate groups. The process is based on the making of a mixed polyanhydride ester of a dibasic acid which is reacted with a dihydroxy compound to form a hydroxy containing intermediate that is subsequently transformed into a polyester carbonate by means of a carbonate forming reagent.