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:
Sep. 29, 2026
Filed:
Feb. 14, 2019
Donaldson Company, Inc., Minneapolis, MN (US);
Aflal Rahmathullah, Savage, MN (US);
Andrew J. Dallas, Lakeville, MN (US);
Stephen K. Sontag, Maple Grove, MN (US);
Bradly G. Hauser, Minneapolis, MN (US);
Davis B. Moravec, Burnsville, MN (US);
Vijay K. Kapoor, Eagan, MN (US);
Matthew P. Goertz, Bloomington, MN (US);
Daniel L. Tuma, St. Paul, MN (US);
Warren E. Dammann, Eden Prairie, MN (US);
Michael J. Cronin, Apple Valley, MN (US);
Mike J. Madsen, Chaska, MN (US);
Stuti S. Rajgarhia, Bloomington, MN (US);
Charles S. Christ, Deephaven, MN (US);
Joseph M. Block, Carver, MN (US);
Donaldson Company, Inc., Minneapolis, MN (US);
Abstract
The current technology relates to substrate treatments, treated substrates, and filters. Treated substrates can have a treated surface that defines a pattern and/or gradient among untreated surface areas. A treated surface area can have a higher roll off angle for a 50 μL water droplet when the surface is immersed in toluene that the untreated surface areas. Substrates can be treated by, for example, exposing a substrate surface and/or fibers to ultraviolet (UV) radiation. UV radiation can be applied to surfaces via a mask, lens, waveguide, reflector, as examples. UV radiation can be applied to surfaces at varying intensities, which can create a treatment gradient.