ALEXANDRIA, Va., March 19 -- United States Patent no. 12,251,654, issued on March 18, was assigned to Donaldson Co. Inc. (Bloomington, Minn.).
"Filter medium comprising a fine fiber layer" was invented by Derek O. Jones (Andover, Minn.), Klenton T. Willis (Woodbury, Minn.), Patricia A. Ignacio-de Leon (Minnetonka, Minn.), Thomas M. Weik (Deephaven, Minn.) and Jacob C. Savstrom (Mound, Minn.).
According to the abstract* released by the U.S. Patent & Trademark Office: "This disclosure describes a filter medium that minimizes the adverse effects of variations in flow rate on filter medium efficiency without a corresponding increase in pressure drop. The filter medium includes a support layer, a continuous fine fiber layer, and an efficiency ...