ALEXANDRIA, Va., May 26 -- United States Patent no. 12,637,376, issued on May 26, was assigned to ASDR CANADA INC. (Malartic, Canada).
"Ozone treatment of mining effluents" was invented by Pascal Marcotte (Calgary, Canada) and Christian Dube (Malartic, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of treating mining effluents containing at least one of nitrogen or cyanide species, the method comprising injecting ozone in the mining effluent in successive treatments performed at different pH. Also, a method of treating mining effluents with bromide and ozone. Also, a method of treating mining effluents containing cyanates with ozone at a relatively low pH."
The patent was filed on March 24, ...