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:
Apr. 13, 2021
Filed:
Jun. 27, 2013
Toray Industries, Inc., Tokyo, JP;
Harutoki Shimura, Otsu, JP;
Yoshie Marutani, Otsu, JP;
Koji Nakatsuji, Otsu, JP;
Kiyohiko Takaya, Otsu, JP;
Masakazu Koiwa, Otsu, JP;
Takao Sasaki, Otsu, JP;
Masahiro Kimura, Otsu, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
A composite semipermeable membrane includes a porous supporting membrane and a separation functional layer, in which, in cross-sections having a length of 2.0 μm in a membrane surface direction, the average number density of projections in the separation functional layer which have a height of one-fifth or more of the 10-point average surface roughness is 10.0-30.0 projections/μm and the projections have an average height less than 100 nm, and in which a water production rate and a salt rejection are predetermined values or more after an aqueous solution is passed through under certain conditions.