US Patent Issued to Mitsui Mining & Smelting on June 17 for "Exhaust gas purifying composition and production method therefor" (Japanese Inventors)

ALEXANDRIA, Va., June 19 -- United States Patent no. 12,330,133, issued on June 17, was assigned to Mitsui Mining & Smelting Co. Ltd. (Tokyo).

"Exhaust gas purifying composition and production method therefor" was invented by Hidekazu Goto (Saitama, Japan), Jo Nishikawa (Saitama, Japan) and Mayuko Suwa (Saitama, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An exhaust gas purifying composition that contains a phosphorus-containing BEA-type zeolite and has further improved heat resistance; and a production method therefor are provided. The exhaust gas purifying composition contains a phosphorus-containing BEA-type zeolite, wherein the phosphorus-containing BEA-type zeolite has a pore volume ratio (V2/V...