Patent · US Active

Filter media and elements

US11253802B2 · kind B2 · utility

1Cited by

78References

9Claims

0Family size

Assignee

Donaldson Company, Inc. · US

Inventors

Qiong Gao · Minneapolis, US
Gregory S. Tronnes · Richfield, US
Rakesh Yadav · Cape Elizabeth, US
Michael A. Madden · Woodbury, US

Key dates

Filing date	Jul 19, 2019
Grant date	Feb 22, 2022
Priority date	—
Expiry date	Dec 5, 2039

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2239/1233
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Fibrous filter medium that includes a melt-blown filter layer comprising melt-blown fibers and a high-efficiency glass-containing filter layer comprising glass fibers.

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