US Patent Issued to CENTRAL GLASS on April 1 for "Tungsten hexafluoride manufacturing method, tungsten hexafluoride purification method, and tungsten hexafluoride" (Japanese Inventors)

ALEXANDRIA, Va., April 2 -- United States Patent no. 12,264,081, issued on April 1, was assigned to CENTRAL GLASS COMPANY Ltd. (Yamaguchi, Japan).

"Tungsten hexafluoride manufacturing method, tungsten hexafluoride purification method, and tungsten hexafluoride" was invented by Takashi Suenaga (Ube, Japan), Takuya Kita (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 with a gas of a fluorine element-containing compound so as to obtain a mixture that contains tungsten hexafluoride and hydrogen fluoride-containing impurities, and a discharge step of perf...