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:
Feb. 03, 1998
Filed:
Feb. 15, 1996
Applicant:
Inventors:
Bhaskar Bhairavnath Idage, Pune, IN;
Sudhakar Sadashiv Mahajan, Pune, IN;
Swaminathan Sivaram, Pune, IN;
Assignee:
Council of Scientific & Ind. Research, New Delhi, IN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528180 ; 528176 ; 528179 ; 528180 ; 528185 ; 528491 ; 528492 ; 528503 ; 524284 ; 524356 ;
Abstract
An improved process for the preparation of aromatic polyesters, whereby dialkyl esters of aromatic dicarboxylic acids are melt-polymerized with aromatic bisphenol to furnish an amorphous poly(arylester) prepolymer. The amorphous poly(arylester) prepolymer is crystallized, separated, and dried to provide a crystallized poly(arylester) prepolymer, which is heated to yield the aromatic polyester.