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. 12, 2024
Filed:
Apr. 22, 2022
Toray Industries, Inc., Tokyo, JP;
Yuta Amano, Ehime, JP;
Shunsuke Tabayashi, Ehime, JP;
Ryosuke Okanishi, Ehime, JP;
Takashi Yoshino, Ehime, JP;
Takao Sasaki, Ehime, JP;
Hiroki Minehara, Shiga, JP;
Masaki Higashi, Ehime, JP;
TORAY INDUSTRIES, INC., Tokyo, JP;
Abstract
The present invention relates to a composite semipermeable membrane including: a support membrane; and a separation functional layer provided on the support membrane, in which the separation functional layer comprises a plurality of protrusions formed of a thin membrane, and at least a part of the plurality of protrusions has a ratio (Wa/Wb) of larger than 1.3 in cross sections at arbitrary ten positions each having a length of 2.0 μm in a membrane surface direction of the support membrane, provided that Wa is a maximum width of the protrusion and Wb is a root width of the protrusion.