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. 18, 1981
Filed:
Mar. 13, 1980
Applicant:
Inventors:
William H Millick, 3rd, Wilmington, NC (US);
Norman R Newburg, Wilmington, DE (US);
Assignee:
Hercofina, Wilmington, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528306 ; 525445 ; 528272 ;
Abstract
Disclosed is a process for producing styrene-soluble unsaturated polyester resins from DMT process residue. In a preferred embodiment of the process, DMT process residue is transesterified with propylene glycol until a hydroxyl-terminated ester product having a methoxyl content within a specified range is formed and then the resulting ester product is esterified with maleic anhydride.