US Patent Issued to HER MAJESTY THE QUEEN IN RIGHT OF CANADA AS REPRESENTED BY THE MINISTER OF NATURAL RESOURCES on March 25 for "Catalyzed particulate filter for soot removal from engine exhaust" (Canadian Inventors)

ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,569, issued on March 25, was assigned to HER MAJESTY THE QUEEN IN RIGHT OF CANADA AS REPRESENTED BY THE MINISTER OF NATURAL RESOURCES (Ottawa).

"Catalyzed particulate filter for soot removal from engine exhaust" was invented by Lioudmila Nossova (Ottawa) and Gianni Caravaggio (Ottawa).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention discloses use of a catalyzed particulate filter loaded with a silver-zirconia catalyst prepared by citric acid-assisted sol-gel method for soot removal from engine exhaust. The invention discloses a method of making xAg/ZrO2 where x is 20 mol %, said method comprises: mixing aqueous solutions of AgNO3 and ZrO...