ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,383,855, issued on Aug. 12, was assigned to Donaldson Co. Inc. (Bloomington, Minn.).
"High efficiency filter media" was invented by Rakesh K. Yadav (Lakeville, Minn.), Daniel L. Tuma (St. Paul, Minn.), Robert R. Levac (Burnsville, Minn.), Byron G. Griffin (Mounds View, Minn.), Jonathan M. Beckett (Richfield, Minn.), Anil Suthar (Eden Prairie, Minn.) and Robert J. Pannepacker Jr. (Oreland, Pa.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Filtration media packs, filter elements, and media are disclosed, including media packs having a plurality of layers of single facer media wherein the layers of single facer media include a fluted sheet, a facing sheet...