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. 11, 2017
Filed:
Dec. 15, 2014
Dow Global Technologies Llc, Midland, MI (US);
Ian A. Tomlinson, Midland, MI (US);
Robert C. Cieslinski, Midland, MI (US);
Bruce B. Gerhart, Midland, MI (US);
David D. Hawn, Midland, MI (US);
Mou Paul, Edina, MN (US);
XiaoHua Qiu, Midland, MI (US);
Mark A. Rickard, Midland, MI (US);
Steven Rosenberg, Shorewood, MN (US);
Abhishek Roy, Edina, MN (US);
Chengli Zu, Midland, MI (US);
Dow Global Technologies LLC, Midland, MI (US);
Abstract
A thin film composite polyamide membrane comprising a porous support and a thin film polyamide layer characterized by possessing: i) an azo (—N═N—) content of from 0.30% to 0.80%, as measured by pyrolysis gas chromatography; and ii) a dissociated carboxylate content of at least 0.18 mol/kg as measured by RBS at pH 9.5.