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:
Sep. 23, 1997
Filed:
Jul. 30, 1996
Applicant:
Inventors:
Win-Sow Winston Ho, Annandale, NJ (US);
Guido Sartori, Annandale, NJ (US);
Warren A Thaler, Flemington, NJ (US);
David C Dalrymple, Bloomsbury, NJ (US);
Assignee:
Exxon Research & Engineering Company, Florham Park, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C08G / ; C08G / ;
U.S. Cl.
CPC ...
210651 ; 525423 ;
Abstract
A copolymer composition comprising the hard segment of a polyimide, the soft segment of an oligomeric aliphatic polyester, and a diepoxide for crosslinking and esterification. The diepoxide polyimide copolymer membranes have exhibited high selectivity and flux for separation of an aromatic/saturate mixture. These membranes have shown much better stability in soaking with an aromatic/saturate feed than the copolymer membranes without a diepoxide.