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. 28, 1990
Filed:
May. 22, 1989
Applicant:
Inventor:
Robert E Michel, Wilmington, NC (US);
Assignee:
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528272 ; 528277 ; 528308 ; 5283086 ; 528502 ; 21050021 ;
Abstract
A process for the removal of manganese catalyst from the bis glycol ester of terephthalic acid, by adding terephthalic acid and/or isophthalic acid, and separating the precipitate.
Quick Actions:
Michel, Robert. (1990). Process for the production of polyethyleneterephthalate from (U.S. Patent No. 4952668). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4952668
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile