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:
Apr. 07, 2015
Filed:
Mar. 05, 2014
Applicant:
Dow Global Technologies Llc, Midland, MI (US);
Inventors:
Mou Paul, Edina, MN (US);
Tina L. Arrowood, Elko New Market, MN (US);
Duane R. Romer, Midland, MI (US);
Assignee:
Dow Global Technologies LLC, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D 1/34 (2006.01); B05D 1/36 (2006.01); B01D 71/56 (2006.01); B01D 69/12 (2006.01); B05D 3/10 (2006.01);
U.S. Cl.
CPC ...
B01D 71/56 (2013.01); B01D 69/125 (2013.01); B05D 1/36 (2013.01); B05D 3/107 (2013.01); B05D 1/34 (2013.01);
Abstract
A method for making a composite polyamide membrane including the step of applying a polyfunctional amine monomer and polyfunctional acyl halide monomer to a surface of the porous support and interfacially polymerizing the monomers to form a thin film polyamide layer, wherein the method is characterized by: i) conducting the interfacial polymerization in the presence of an aromatic anhydride monomer include at least one sulfonyl halide functional group, or ii) applying the aromatic anhydride monomer to the thin film polyamide layer.