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:
Apr. 28, 1987
Filed:
Apr. 01, 1986
Applicant:
Inventor:
Gautam R Ranade, East Lyme, CT (US);
Assignee:
Celanese Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528176 ; 528194 ;
Abstract
A process for forming polyesters with reduced yellow coloration wherein the polyester-forming monomers are dried in a vacuum before being reacted. The reaction system itself contains a substantially deoxygenated atmosphere. The removal of oxygen from the reactants and the reaction system leads to the lessening of yellow coloration of the polyester product.