ALEXANDRIA, Va., April 21 -- United States Patent no. 12,605,719, issued on April 21, was assigned to Ecolab USA Inc. (St. Paul, Minn.).

"Methods and compositions for processing sulfide ores" was invented by Christopher Ryan Greulich (Tucson, Ariz.), Kevin O'Brien (Saint Charles, Ill.) and Michael Ignazio LaRosa (Palacios, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "Described herein are methods of reducing the viscosity of products of sulfide ore froth flotation. A froth overflow, or an underflow of sulfide ore flotation is treated using a nonionic compound to reduce the viscosity of a froth or an underflow. The lowered viscosity imparts several benefits in sulfide ore processing of copper and molyb...