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:
Jan. 10, 2012
Filed:
Apr. 25, 2007
Sho Sugiyama, Tokyo, JP;
Takuya Hasegawa, Yokohama, JP;
Takahiko Kondo, Tokyo, JP;
Hidetoshi Masugi, Tokyo, JP;
Takashi Nozaki, Tokyo, JP;
Sho Sugiyama, Tokyo, JP;
Takuya Hasegawa, Yokohama, JP;
Takahiko Kondo, Tokyo, JP;
Hidetoshi Masugi, Tokyo, JP;
Takashi Nozaki, Tokyo, JP;
Asahi Kasei Chemicals Corporation, Tokyo, JP;
Abstract
A gas separation membrane has: a polymeric microporous membrane which has a polyolefin as a main component, and which is manufactured by wet phase separation process, and has a porosity of 20 to 80%, an average pore diameter of 1 to 100 nm and a piercing strength at 100° C. of 2 to 50 N; and a gas-separating thin film, which is provided on at least one surface, and/or the interior of the polymeric microporous membrane, and which comprises a fluorine-containing gas-separating resin as a main component, and has an average thickness of 0.01 μm to less than 0.4 μm. The gas separation membrane having an oxygen-nitrogen separation factor not smaller than 1.4.