ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,521,735, issued on Jan. 13, was assigned to Voith Patent GmbH (Heidenheim, Germany).

"Hydro-cyclone system" was invented by Axel Erzler (Elchingen Thalfingen, Germany) and Thomas Jaschek (Bergatreute, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system for purifying a fibrous suspension consists of multiple hydro-cyclones arranged adjacent to one another in a row, each of the hydro-cyclones having at least one feed connection, one accepted stock connection and one reject material connection, and having at least one supply manifold which is connected to multiple feed connections and/or having at least one accepted stock manifold which is conn...