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. 12, 2014
Filed:
Sep. 29, 2009
Hideto Matsuyama, Hyogo, JP;
Takahiro Ono, Kyoto, JP;
Satoshi Kawanaka, Kyoto, JP;
Kazuo Hirota, Osaka, JP;
Hideto Matsuyama, Hyogo, JP;
Takahiro Ono, Kyoto, JP;
Satoshi Kawanaka, Kyoto, JP;
Kazuo Hirota, Osaka, JP;
Unitika Ltd., Hyogo, JP;
Abstract
A hollow fiber membrane is produced through a thermally induced phase separation process by dissolving a highly hydrophilic polyamide resin in a high-boiling-point solvent such as an aprotic polar solvent at a temperature of not lower than 100° C. The hollow fiber membrane has a membrane surface having a water contact angle of not greater than 80 degrees, and has a water permeability of not less than 100 L/m·atm·h and a 0.1-μm particle rejection percentage of not less than 90%.