ALEXANDRIA, Va., April 21 -- United States Patent no. 12,605,677, issued on April 21, was assigned to TORAY INDUSTRIES Inc. (Tokyo).
"Method for analyzing composite semipermeable membrane" was invented by Koji Nakatsuji (Iyo-gun, Japan), Kazuya Sugita (Iyo-gun, Japan) and Hiroo Takabatake (Otsu, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a method for analyzing a halogenated structure in a composite semipermeable membrane. The method for analyzing a composite semipermeable membrane according to the present invention includes: a step A for immersing the composite semipermeable membrane in a solution containing alkali and at least one of nicotinamide and a derivative the...