US Patent Issued to Wuhan Oxiran Special Chemicals on June 30 for "Method for preparing electronic-grade ethylene sulfate" (Chinese Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,668,580, issued on June 30, was assigned to Wuhan Oxiran Special Chemicals Co. (Wuhan, China).

"Method for preparing electronic-grade ethylene sulfate" was invented by Fan Ren (Wuhan, China), Liang Wang (Wuhan, China), Wenchao Song (Wuhan, China), Rongming Dai (Wuhan, China), Lichun Liang (Wuhan, China) and Xianmiao Cui (Wuhan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "In a method for preparing electronic-grade vinyl sulfate, a sulfur trioxide solution is prepared by dissolving sulfur trioxide with a solution A, an ethylene oxide solution is prepared by mixing a solution B with ethylene oxide, the sulfur trioxide solution and the ethylene oxi...