ALEXANDRIA, Va., June 19 -- United States Patent no. 12,330,170, issued on June 17, was assigned to OUTOTEC (FINLAND) OY (Espoo, Finland).
"Froth flotation cell" was invented by Antti Rinne (Espoo, Finland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A froth flotation cell for treating mineral ore particles suspended in slurry includes a tank, a gas supply, a first froth collection channel, a second froth collection channel arranged between the centre of the tank and the first froth collection channel, and a radial froth collection launder including a radial froth overflow lip, and extending from the first froth collection channel towards the second froth collection channel. The froth flotation cell furthe...