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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.:

US 11090613 B1

PDFFull Text
Date of Patent:
Aug. 17, 2021

Filed:

Dec. 16, 2016

Composite semipermeable membrane and method for producing composite semipermeable membrane

Applicant:

Toray Industries, Inc., Tokyo, JP;

Inventors:

Hiroaki Tanaka, Shiga, JP;

Hiroki Minehara, Shiga, JP;

Koji Nakatsuji, Ehime, JP;

Masahiro Kimura, Shiga, JP;

Assignee:

TORAY INDUSTRIES, INC., Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Clare M Perrin

Int. Cl.
CPC ...
B01D 69/02 (2006.01); C02F 1/44 (2006.01); B01D 69/10 (2006.01); B01D 67/00 (2006.01); C02F 103/08 (2006.01); B01D 69/12 (2006.01); B01D 71/56 (2006.01);
U.S. Cl.
CPC ...
B01D 69/02 (2013.01); B01D 67/0006 (2013.01); B01D 69/10 (2013.01); C02F 1/44 (2013.01); B01D 67/0093 (2013.01); B01D 69/125 (2013.01); B01D 71/56 (2013.01); B01D 2323/30 (2013.01); B01D 2323/40 (2013.01); B01D 2325/02 (2013.01); B01D 2325/20 (2013.01); C02F 2103/08 (2013.01); Y02A 20/131 (2018.01);
Abstract

This composite semipermeable membrane is provided with: a porous supporting membrane that comprises a base and a porous supporting layer; and a separating function layer that is provided on the porous supporting layer. With respect to this composite semipermeable membrane, the standard deviation of pore radius of the separating function layer as determined by positron annihilation lifetime measurement is 0.025 nm or less.

Find Patent Forward Citations

Tanaka, Hiroaki. (2021). Composite semipermeable membrane and method for producing composite semipermeable membrane (U.S. Patent No. 11090613). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11090613

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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