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:
May. 29, 2014
Toray Industries, Inc., Tokyo, JP;
Shuji Furuno, Shiga, JP;
Yoshiki Okamoto, Shiga, JP;
Hiroho Hirozawa, Shiga, JP;
Masahiro Kimura, Shiga, JP;
Takao Sasaki, Shiga, JP;
TORAY INDUSTRIES, INC., Tokyo, JP;
Abstract
In order to provide a composite semipermeable membrane which combines strength and water permeability, the present invention provides a composite semipermeable membrane including: a supporting membrane including a substrate and a porous support; and a separation functional layer disposed on the porous support, in which the substrate has a weight A per unit area, a portion of the porous support which is located within the substrate has a weight B per unit area, and a sum of the weight A and the weight B, (A+B), is 30 to 100 g/m, and a ratio between the weight A and the weight B, B/A, is 0.10 to 0.60.