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. 21, 2012
Filed:
Mar. 23, 2009
Applicants:
Nusrat Farzana, Lee's Summit, MO (US);
David Kazemi, Lee's Summit, MO (US);
Inventors:
Nusrat Farzana, Lee's Summit, MO (US);
David Kazemi, Lee's Summit, MO (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 67/00 (2006.01); B01D 39/16 (2006.01); B01D 46/00 (2006.01); B01D 46/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A layered filter membrane with improved anti-clogging characteristics is provided. In one embodiment, a filter membrane includes multiple polymer layers, each with different pore diameters formed by stretching the polymer layers. Furthermore, the multiple filter layers are coupled together before being stretched and the different pore sizes are formed during co-stretching of the filter layers.