logo

For the Inventor, By the Inventor

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.:

US 8894859 B1

PDFFull Text
Date of Patent:
Nov. 25, 2014

Filed:

Apr. 27, 2007

Asymmetric membranes for use in nanofiltration

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;

Attorneys:

JWIP & Patent Services, LLC

Jacob G. Weintraub, Esq.

Primary Examiner:

Ana Fortuna

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.

Find Patent Forward Citations

Quick Actions:

Livingston, Andrew. (2014). Asymmetric membranes for use in nanofiltration (U.S. Patent No. 8894859). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8894859

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Loading…