Patent · US Active

Filter media, elements, and methods

US11845027B2 · kind B2 · utility

1Cited by

22References

23Claims

0Family size

Assignee

Donaldson Company, Inc. · US

Inventors

Qiong Gao · Minneapolis, US
Richard Dejong · Eden Prairie, US
Gregory S. Tronnes · Richfield, US
Jason A. Tiffany · Bloomington, US
Giancarlo M. Izzi · Minneapolis, US

Key dates

Filing date	Oct 12, 2021
Grant date	Dec 19, 2023
Priority date	—
Expiry date	Nov 13, 2041

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2239/1275
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Fibrous filter medium that includes a surface-loading filter layer comprising fine fibers having an average diameter of less than 1 micron; a depth loading filter layer; and a support layer; wherein the layers are configured and arranged for placement in a gas stream with the surface loading filter layer being the most upstream layer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.