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:
Aug. 19, 2014
Filed:
Mar. 10, 2010
Naiying Du, Ottawa, CA;
Michael D. Guiver, Ottawa, CA;
Gilles P. Robertson, Gatineau, CA;
Jingshe Song, Sugar Land, TX (US);
Naiying Du, Ottawa, CA;
Michael D. Guiver, Ottawa, CA;
Gilles P. Robertson, Gatineau, CA;
Jingshe Song, Sugar Land, TX (US);
National Research Council of Canada, Ottawa, ON, CA;
Abstract
A film of a carboxylated polymer of formula (I): wherein the sum of x, y and z is an integer from 10 to 10,000 and degree of hydrolysis is 0.05 or greater provides gas separation materials in which the degree of hydrolysis may be used to tune the selectivity of the gases to an optimal required range. Such films may be prepared by casting a film of a polymer of formula (II): wherein n is an integer from 10 to 10,000, and hydrolyzing all or a portion of the —CN groups to form —COOH groups.