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:
Dec. 20, 2005
Filed:
Mar. 17, 2004
Kwok-shun Cheng, Nashua, NH (US);
T. Dean Gates, Bedford, MA (US);
Larry Y. Yen, Andover, MA (US);
Rajnikant B. Patel, Tewksbury, MA (US);
Kwok-Shun Cheng, Nashua, NH (US);
T. Dean Gates, Bedford, MA (US);
Larry Y. Yen, Andover, MA (US);
Rajnikant B. Patel, Tewksbury, MA (US);
Mykrolis Corporation, Billerica, MA (US);
Abstract
Hollow fiber membranes having a skinned surface on one diameter, and a porous surface on the opposite diameter are produced from perfluorinated thermoplastic polymers by extruding a heated solution of the polymer having a low critical solution temperature directly into a cooling bath to form the porous membrane by liquid-liquid phase separation. Extrusion can be conducted either vertically or horizontally. The hollow fiber membranes are useful as ultrafiltration membranes and as membrane contactors.