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:
Mar. 04, 2025
Filed:
Mar. 27, 2020
Applicant:
Donaldson Company, Inc., Minneapolis, MN (US);
Inventors:
Gregory S. Tronnes, Bloomington, MN (US);
Robert M. Rogers, Minnetonka, MN (US);
Aflal Rahmathullah, Savage, MN (US);
Assignee:
Donaldson Company, Inc., Bloomington, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 53/02 (2006.01); B01D 39/16 (2006.01); B01D 39/18 (2006.01);
U.S. Cl.
CPC ...
B01D 39/1623 (2013.01); B01D 39/18 (2013.01); B01D 2239/0654 (2013.01); B01D 2239/069 (2013.01); B01D 2239/1233 (2013.01);
Abstract
Embodiments disclosed herein relate to filter media having a downstream layer of filter material and an upstream layer of fibers. The downstream layer of filter material has a capture efficiency of at least 10% and the upstream layer of fibers has a mean fiber diameter of at least 10 microns and a solidity of less than 10%. A spacing structure defines a mean void distance between the upstream layer of fibers and the downstream layer of filter material.