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:
Aug. 12, 2025
Filed:
May. 26, 2022
Donaldson Company, Inc., Bloomington, MN (US);
Mikayla A. Yoder, Eagan, MN (US);
Christopher P. Conklin, Columbia, MD (US);
Davis B. Moravec, Burnsville, MN (US);
Andrew J. Dallas, Lakeville, MN (US);
Tianheng Zhao, Cambridge, GB;
Richard W. Janse Van Rensburg, Great Cambourne, GB;
Peter Jackson, Royston, GB;
Blane Scott, Cambridge, GB;
Donaldson Company, Inc., Bloomington, MN (US);
Abstract
A filter material has a layer of porous material and a plurality of structures disposed on a surface of the layer, where each of the structures has a re-entrant geometry. The plurality of structures may be a plurality of ordered structures. A filter material may include a layer of porous material and a plurality of re-entrant structures disposed on a surface of the layer, each of the re-entrant structures including a stem and a cap, where the caps of adjacent structures are attached to each other to form a plurality of pores, where each pore is disposed between adjacent re-entrant structures.