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:
May. 28, 1985
Filed:
Mar. 20, 1984
Applicant:
Inventors:
Yoshihiro Arai, Joyo, JP;
Takumi Tanaka, Uji, JP;
Assignee:
Unitika Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
525438 ; 528288 ; 528297 ;
Abstract
This invention is a method of making heat-resistant polyester, the method being characterized by reacting the polyester consisting of the aromatic dicarboxylic acid and the glycol with 2-6 carbons with 0.1-5 wt % of the bifunctional epoxy compound expressed by the general formula ##STR1## (R is hydrocarbon group; it may be substituted) to reduce the amount of end carboxyl group to less than 15 g equivalents per 10.sup.6 g of the polymer.
Arai, Yoshihiro. (1985). Method of making heat-resistant polyester by reacting with a (U.S. Patent No. 4520175). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4520175
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile