ALEXANDRIA, Va., Jan. 26 -- The United States Patent and Trademark Office has granted patent no. 9,242,199 to Donaldson Company, Inc. titled as "Air filter arrangement; air cleaner assembly; and, methods" by inventors Benny Kevin Nelson (Bloomington, MN) and David W. Nelson (Coon Rapids, MN).
A media pack for including in a filter cartridge of an air filter arrangement, is provided. A variety of configurations for the media pack are described and shown, an example shown being trapezoidal. Filter cartridges including such media packs, air cleaner assemblies and equipment systems are described. Also methods of use assembly are described.