ALEXANDRIA, Va., June 5 -- United States Patent no. 12,275,020, issued on April 15, was assigned to Good Earth IP Holdings LLC (Peoria, Ariz.).

"Separation of minerals by specific gravity" was invented by Jody G. Robbins (Phoenix) and Joseph Richard Wantulok (Phoenix).

According to the abstract* released by the U.S. Patent & Trademark Office: "A centrifuge for separating minerals by specific gravity is disclosed. The centrifuge rotates to circulate slurry across a collection region and to subject slurry in the collection region to centripetal forces that facilitate stratification within the collection region by the specific gravity of the constituent minerals of the slurry. Energy, such as acoustic energy, is coupled with the collection r...