Patent · US Active

Filter media, elements, and methods

US11161070B2 · kind B2 · utility

2Cited by

20References

26Claims

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	May 5, 2017
Grant date	Nov 2, 2021
Priority date	—
Expiry date	Jun 27, 2037

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.