ALEXANDRIA, Va., July 14 -- United States Patent no. 12,678,710, issued on July 14, was assigned to SHIN-ETSU CHEMICAL Co. LTD. (Tokyo).

"Liquid-liquid extraction unit and multistage liquid-liquid extraction apparatus using the same" was invented by Hiroto Sugahara (Echizen, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A liquid-liquid extraction unit includes a feed compartment for receiving an aqueous phase and an organic phase, mixing feeder such as a pump for mixing the aqueous and organic phases and conveying the mixture under pressure to a reaction compartment where the mixture is subjected to an extractive reaction, and a resting compartment for separating the mixture back into an aqueous phase...