ALEXANDRIA, Va., April 15 -- United States Patent no. 12,599,872, issued on April 14, was assigned to MITSUBISHI HEAVY INDUSTRIES LTD. (Tokyo).

"Denitration catalyst and method for purifying exhaust gas" was invented by Shimpei Kaneda (Tokyo) and Keiichiro Kai (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for purifying combustion exhaust gas, comprising: placing a denitration catalyst in gas stream to remove nitrogen oxides from a combustion exhaust gas, wherein the denitration catalyst comprises a shaped product comprising a catalyst component and having microcracks on the surface of the shaped-product, and 80% to 100% of the microcracks on the number basis have an angle of a longitudinal d...