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:
Nov. 25, 2014
Filed:
Apr. 27, 2007
Applicants:
Andrew Guy Livingston, Knebworth, GB;
Yoong Hsiang See-toh, Wembley, GB;
Inventors:
Andrew Guy Livingston, Knebworth, GB;
Yoong Hsiang See-Toh, Wembley, GB;
Assignee:
Imperial Innovations Limited, London, GB;
Primary Examiner:
Int. Cl.
CPC ...
B01D 61/00 (2006.01); B01D 39/00 (2006.01); B01D 39/14 (2006.01); B01D 29/00 (2006.01); B01D 61/02 (2006.01); B01D 67/00 (2006.01); C08G 73/10 (2006.01); B01D 71/64 (2006.01); B01D 71/76 (2006.01);
U.S. Cl.
CPC ...
B01D 61/027 (2013.01); B01D 67/0088 (2013.01); B01D 2323/30 (2013.01); C08G 73/1042 (2013.01); C08G 73/10 (2013.01); B01D 71/64 (2013.01); B01D 71/76 (2013.01);
Abstract
Improved integrally skinned asymmetric membranes for organic solvent nanofiltration, and their methods of preparation and use are disclosed. Membranes are formed from polyimides by phase inversion and are then crosslinked by addition of amine crosslinking agents that react with the imide groups of the polyimide, creating amide bonds. These stabilize the membranes and allow solvent nanofiltration to be maintained even in the solvents from which the membranes were formed by phase inversion.