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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 10376845 B1

PDFFull Text
Date of Patent:
Aug. 13, 2019

Filed:

Apr. 14, 2016

Membranes with tunable selectivity

Applicant:

Lockheed Martin Corporation, Bethesda, MD (US);

Inventors:

Jacob Louis Swett, Redwood City, CA (US);

Sarah M. Simon, Baltimore, MD (US);

Peter V. Bedworth, Los Gatos, CA (US);

Assignee:

Lockheed Martin Corporation, Bethesda, MD (US);

Attorney:

Foley & Lardner LLP

Primary Examiner:

Ryan B Huang

Int. Cl.
CPC ...
B01D 69/12 (2006.01); A61M 1/16 (2006.01); B32B 37/14 (2006.01); B32B 37/06 (2006.01); B32B 38/00 (2006.01); A61M 37/00 (2006.01); A61K 47/02 (2006.01); A61M 1/34 (2006.01); B01D 71/02 (2006.01); B01D 67/00 (2006.01); B01D 65/00 (2006.01); B01D 61/02 (2006.01); C02F 1/44 (2006.01); A61K 9/70 (2006.01); B01D 69/02 (2006.01); B32B 9/00 (2006.01); C01B 32/194 (2017.01); C02F 3/12 (2006.01);
U.S. Cl.
CPC ...
B01D 69/12 (2013.01); A61M 1/1621 (2014.02); A61M 1/34 (2013.01); B01D 69/02 (2013.01); B01D 71/021 (2013.01); B32B 9/007 (2013.01); B32B 38/0032 (2013.01); C01B 32/194 (2017.08); B01D 2313/14 (2013.01); B01D 2313/19 (2013.01); B01D 2325/02 (2013.01); B01D 2325/04 (2013.01); B32B 2307/726 (2013.01); B32B 2313/04 (2013.01); C02F 1/44 (2013.01); C02F 3/1268 (2013.01); Y02W 10/15 (2015.05);
Abstract

Some embodiments comprise membranes comprising a first layer comprising a porous graphene-based material; a second layer comprising a porous graphene-based material; a channel positioned between the first layer and the second layer, wherein the channel has a tunable channel diameter; and at least one spacer substance positioned in the channel, wherein the spacer substance is responsive to the environmental stimulus. In some cases, the membranes have more than two layers of porous graphene-based material. Permeability of a membrane can be altered by exposing the membrane to an environmental stimulus. Membranes can be used in methods of water filtration, immune-isolation, timed drug release (e.g., sustained or delayed release), hemodialysis, or hemofiltration.

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