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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 9649599 B1

PDFFull Text
Date of Patent:
May. 16, 2017

Filed:

May. 31, 2016

Surface-modified fluoropolymer membrane

Applicant:

W. L. Gore & Associates, Inc., Newark, DE (US);

Inventors:

Bradley Marshall McClary, Elkton, MD (US);

Tarun Poddar, Newark, DE (US);

Assignee:

W. L. Gore & Associates, Inc., Newark, DE (US);

Attorney:

Kilpatrick Townsend & Stockton, LLP

Primary Examiner:

Ana Fortuna

Int. Cl.
CPC ...
B01D 39/00 (2006.01); B01D 39/14 (2006.01); B01D 71/26 (2006.01); B01D 69/02 (2006.01); D02J 1/22 (2006.01); D02J 1/06 (2006.01); B29C 49/08 (2006.01); B01D 67/00 (2006.01); B01D 71/32 (2006.01); B01D 61/18 (2006.01); B01D 69/10 (2006.01); B01D 71/36 (2006.01); B29C 59/04 (2006.01); B29K 27/18 (2006.01); B29K 105/04 (2006.01); B29L 31/00 (2006.01);
U.S. Cl.
CPC ...
B01D 69/02 (2013.01); B01D 61/18 (2013.01); B01D 67/0086 (2013.01); B01D 69/10 (2013.01); B01D 71/32 (2013.01); B01D 71/36 (2013.01); B29C 49/08 (2013.01); D02J 1/06 (2013.01); D02J 1/22 (2013.01); B01D 2323/00 (2013.01); B01D 2323/42 (2013.01); B01D 2325/02 (2013.01); B01D 2325/04 (2013.01); B01D 2325/42 (2013.01); B29C 59/04 (2013.01); B29K 2027/18 (2013.01); B29K 2105/04 (2013.01); B29L 2031/755 (2013.01);
Abstract

A method for use in the manufacture of a filtration article includes providing a porous, fluoropolymer membrane, and applying a force to at least a portion of a first side surface of the membrane to modify the first side surface. The applied force may have a non-normal directional component relative to the first side surface. The surface modification may increase the density of the modified surface and/or reduce the porosity of the modified surface. Particle retention capabilities are thereby enhanced across the modified surface while maintaining permeability across the volume of the membrane.

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