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:
Sep. 01, 2026
Filed:
Nov. 30, 2022
Toray Industries, Inc., Chuo-ku, JP;
Yoshiyuki Kawashima, Otsu, JP;
Kazunori Tomioka, Otsu, JP;
Koji Nakatsuji, Iyo-gun, JP;
Seiichi Amamiya, Otsu, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
The present invention relates to a state diagnosis method for a separation membrane element, including: calculating an initial value of a membrane separation performance based on at least any of a pressure, a flow rate, and a solute concentration of water-to-be-treated and at least any of a pressure, a flow rate, and a solute concentration of permeate; measuring a permeate quality at at least two locations in a permeate channel; calculating the membrane separation performance for each of the measurement locations using the initial value of the membrane separation performance, and determining an evaluation membrane separation performance; comparing the determined evaluation membrane separation performance with a reference membrane separation performance as a reference; and determining a state of the separation membrane element based on a predetermined state diagnosis reference of the separation membrane element.