The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 2026
Filed:
Apr. 02, 2021
Donaldson Company, Inc., Bloomington, MN (US);
Derek O. Jones, Andover, MN (US);
Joseph M. Block, Carver, MN (US);
Klenton T. Willis, Woodbury, MN (US);
Patricia A. Ignacio-De Leon, Minnetonka, MN (US);
James P. Barsness, Dennison, MN (US);
Dustin A. Zastera, Hastings, MN (US);
William A. Osmer, Prescott, WI (US);
Thomas M. Weik, Deephaven, MN (US);
Jacob C. Savstrom, Mound, MN (US);
Donaldson Company, Inc., Bloomington, MN (US);
Abstract
This disclosure describes filter media and mask filters and face mask systems including those filter media. In one aspect, the filter media includes a fibrous media including multi-component binder fibers, glass fibers, and microfibrillated cellulose fibers. In some aspects, the fibrous media further includes PET fibers. In another aspect, the filter media includes an electrostatically charged filter media, a fine fiber layer, and a scrim. In yet another aspect, the filter media includes two fine fiber layers, and two scrims. In additional aspects, the filter media includes bicomponent fibers, polyethylene terephthalate fibers, and microfibrillated cellulose fibers. In a further aspect, the filter media includes a support layer, a continuous fine fiber layer, and an efficiency layer. Combinations and composites of the filter media are also contemplated.