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:
Nov. 28, 2017
Filed:
Sep. 19, 2013
Applicant:
Toray Industries, Inc., Tokyo, JP;
Inventors:
Keisuke Yoneda, Otsu, JP;
Jun Okabe, Otsu, JP;
Takao Sasaki, Otsu, JP;
Masahiro Kimura, Otsu, JP;
Masahiro Henmi, Tokyo, JP;
Assignee:
Toray Industries, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 69/00 (2006.01); C02F 1/44 (2006.01); B01D 71/56 (2006.01); B01D 61/08 (2006.01); B01D 69/10 (2006.01); B01D 69/12 (2006.01); B01D 67/00 (2006.01); B01D 71/44 (2006.01); B01D 69/14 (2006.01); B01D 71/68 (2006.01); C02F 103/08 (2006.01);
U.S. Cl.
CPC ...
B01D 71/56 (2013.01); B01D 61/08 (2013.01); B01D 67/0006 (2013.01); B01D 69/10 (2013.01); B01D 69/12 (2013.01); B01D 69/125 (2013.01); B01D 69/141 (2013.01); B01D 71/44 (2013.01); B01D 71/68 (2013.01); C02F 1/441 (2013.01); C02F 2103/08 (2013.01);
Abstract
Provided is a composite semipermeable membrane having a high salt removal rate and a high water permeability. The composite semipermeable membrane comprises a substrate, a porous support layer formed on the substrate, and a separation functional layer formed on the porous support layer, the hydrophilic macromolecule concentration on the substrate-side surface of the porous support layer being higher than that on the separation functional layer-side surface.