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:
Jan. 07, 1992
Filed:
May. 16, 1990
Applicant:
Inventor:
Benito See, Belle Mead, NJ (US);
Assignee:
Amoco Corporation, Chicago, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ; C08L / ; C08G / ; C08G / ;
U.S. Cl.
CPC ...
528271 ; 528176 ; 528272 ;
Abstract
Described herein is an improved process for preparing an ester derivative of a dihydric phenol by reacting the dihydric phenol with an acid anhydride wherein the improvement comprises carrying out the reaction in the presence of a particular adsorbent. Also described herein is a method of treating an ester derivative of a dihydric phenol with a particular adsorbent.
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See, Benito. (1992). Process for preparing a color-improved thermoplastic polyarylate polymer (U.S. Patent No. 5079335). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5079335
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile