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:
Jul. 16, 2019
Filed:
Feb. 16, 2011
Takashi Kamada, Osaka, JP;
Takuji Shintani, Osaka, JP;
Toshinori Tsuru, Hiroshima, JP;
Tomohisa Yoshioka, Hiroshima, JP;
Chunlong Kong, Hiroshima, JP;
Takashi Kamada, Osaka, JP;
Takuji Shintani, Osaka, JP;
Toshinori Tsuru, Hiroshima, JP;
Tomohisa Yoshioka, Hiroshima, JP;
Chunlong Kong, Hiroshima, JP;
NITTO DENKO CORPORATION, Osaka, JP;
Abstract
The present invention provides a composite separation membrane with improved separation performance, particularly with an increased permeation flux. The composite separation membrane of the present invention includes a porous support () and a separation functional layer () formed on this support (). The separation functional layer () is a polyamide membrane having a 'double-folded structure' including a first layer portion () with a plurality of projections (, (. . . ) and a second layer portion () that covers at least one or some (and) of these projections. Some projections (and) of the first layer portion () extend upward and branch to form the second layer portion (). There is a vacant space () between the first layer portion () and the second layer portion ().