Invention Grant
- Patent Title: End of service life indicating systems for layered filter cartridges
- Patent Title (中): 分层滤芯使用寿命指示系统结束
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Application No.: US14362522Application Date: 2012-12-04
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Publication No.: US09358494B2Publication Date: 2016-06-07
- Inventor: Kevin A. Frankel , Maria L. Zelinsky
- 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/US2012/067703 WO 20121204
- International Announcement: WO2013/090052 WO 20130620
- Main IPC: B01D53/04
- IPC: B01D53/04 ; A62B18/08 ; A62B9/00 ; B01D45/16 ; B01D46/24 ; B01D46/42 ; B01D53/30

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 second sorbent layer has a higher adsorption capacity and/or higher adsorption rate than the first sorbent layer. The sensing element indicates the passage of an adsorption wavefront through the filter cartridge.
Public/Granted literature
- US20140326134A1 END OF SERVICE LIFE INDICATING SYSTEMS FOR LAYERED FILTER CARTRIDGES Public/Granted day:2014-11-06
Information query
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