ALEXANDRIA, Va., Feb. 26 -- United States Patent no. 12,233,367, issued on Feb. 25, was assigned to Donaldson Co. Inc. (Bloomington, Minn.).
"Filter media, elements, and methods" was invented by Qiong Gao (Minneapolis), Richard Patrick DeJong (Eden Prairie, Minn.), Gregory S. Tronnes (Richfield, Minn.), Jason A. Tiffany (Bloomington, Minn.) and Giancarlo M. Izzi (Minneapolis).
According to the abstract* released by the U.S. Patent & Trademark Office: "Fibrous filter medium that includes a surface-loading filter layer comprising fine fibers having an average diameter of less than 1 micron; a depth loading filter layer; and a support layer; wherein the layers are configured and arranged for placement in a gas stream with the surface loading...