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. 18, 1990
Filed:
Aug. 03, 1989
Applicant:
Inventors:
Michael J Amone, Monmouth Junction, NJ (US);
Barry D Dean, Belle Mead, NJ (US);
Assignee:
Amoco Corporation, Chicago, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; C08G / ;
U.S. Cl.
CPC ...
528271 ; 528125 ; 528126 ; 528171 ; 528173 ; 528174 ; 528176 ; 528272 ;
Abstract
An improved diester process is provided for preparing a polyarylate polymer which process comprises reacting at least one aromatic dicarboxylic acid and a diester derivative of a dihydric phenol and an ester-forming agent having no hydrogens alpha to a carbonyl group of the ester-forming agent. Polyarylates produced by the improved process of this invention have a low degree of coloration, melt stability and a low level of haze.
Amone, Michael. (1990). Process for preparing polyarylate from an ester derivative of a dihydric (U.S. Patent No. 4978739). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4978739
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile