ALEXANDRIA, Va., March 5 -- United States Patent no. 12,239,942, issued on March 4, was assigned to NITTO DENKO Corp. (Osaka, Japan).
"Separation membrane" was invented by Tomotsugu Miyabe (Osaka, Japan) and Atsuhito Komoto (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A separation membrane (10) of the present disclosure includes: a separation functional layer (30) composed of a polyamide containing, as a monomer unit, at least one selected from the group consisting of piperazine and a piperazine derivative; and a coating (40) covering the separation functional layer (30) and containing a polymer having a repeating unit represented by the following formula (1). In the formula (1), N+ is a nitr...