Patent · US Active

Filter media and elements

US9474994B2 · kind B2 · utility

8Cited by

74References

12Claims

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	Jun 17, 2014
Grant date	Oct 25, 2016
Priority date	—
Expiry date	Jul 19, 2034

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB03C3/28
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.