ALEXANDRIA, Va., April 21 -- United States Patent no. 12,606,464, issued on April 21, was assigned to KURITA WATER INDUSTRIES LTD. (Tokyo).
"Membrane separation method" was invented by Yuta Ohtsuka (Tokyo), Kunihiro Hayakawa (Tokyo) and Gou Nakagawa (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "The purpose of the present invention is to provide a technique whereby it becomes possible to operate for a longer period of time in an aqueous system equipped with a membrane separation apparatus. The present invention can provide a membrane separation method, the method comprising containing a combined-chlorine-based oxidizing agent to water of interest, and allowing the water of interest which contains the ...