Invention Grant
- Patent Title: End of service life indicating systems for layered filter cartridges
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Application No.: US14775812Application Date: 2014-03-07
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Publication No.: US09751038B2Publication Date: 2017-09-05
- Inventor: Kevin A. Frankel , J. Christopher Thomas , Melissa A. Checky , Maria L. Zelinsky , Denise L. Goddard
- Applicant: 3M INNOVATIVE PROPERTIES COMPANY
- Applicant Address: US MN St. Paul
- Assignee: 3M Innovative Properties Company
- Current Assignee: 3M Innovative Properties Company
- Current Assignee Address: US MN St. Paul
- Agent Jeffrey M. Olofson
- International Application: PCT/US2014/021513 WO 20140307
- International Announcement: WO2014/149917 WO 20140925
- Main IPC: B01D53/04
- IPC: B01D53/04 ; A62B9/00 ; A62B18/08

Abstract:
Layered filtered cartridge systems with an End of Service Life Indicating system include a filter cartridge that includes filter media. The filter media includes a multi-layer construction, of a first sorbent layer, a second sorbent layer, and a sensing element adjacent to the first and second sorbent layers such that an indicating element of the sensing element is located at the interface between the first and second sorbent layers. The first sorbent layer has a higher adsorption capacity and/or higher adsorption rate than the second sorbent layer. The sensing element indicates the passage of an adsorption wavefront through the filter cartridge.
Public/Granted literature
- US20160030877A1 End of Service Life Indicating Systems For Layered Filter Cartridges Public/Granted day:2016-02-04
Information query
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