ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,741,924, issued on Sept. 22, was assigned to NIPPON SHOKUBAI Co. LTD. (Osaka, Japan).
"Purification device" was invented by Masashi Mukae (Himeji, Japan), Yasutaka Takemoto (Himeji, Japan) and Hiroki Wada (Himeji, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a method for obtaining high-quality products. The present invention relates to a purification apparatus that purifies crystals, the purification apparatus including: a hydraulic wash column that includes a discharging port for a crystal-containing circulation slurry and a return port for a circulation liquid containing a melt of discharged crystals; a pipe tha...