US Patent Issued to CENTRAL GLASS on May 20 for "Tungsten hexafluoride manufacturing method, tungsten hexafluoride purification method, and tungsten hexafluoride" (Japanese Inventors)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,304,833, issued on May 20, was assigned to CENTRAL GLASS COMPANY Ltd. (Yamaguchi, Japan).

"Tungsten hexafluoride manufacturing method, tungsten hexafluoride purification method, and tungsten hexafluoride" was invented by Mitsuya Ohashi (Ube, Japan), Takanori Hamana (Ube, Japan), Takanori Ogata (Ube, Japan) and Ryuichi Nakamura (Ube, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A tungsten hexafluoride manufacturing method of the present invention includes a reaction step of reacting tungsten containing arsenic or an arsenic compound with a gas of a fluorine element-containing compound so as to obtain a mixture containing tungsten hexafluoride and...