3M Innovative Properties Company

Kevin A Frankel

Maria Lenni Zelinsky

Gary E Dwyer

Pierre Legare

J Christopher Thomas

Denise L Goddard

Melissa A Checky

Maria L Zelinsky

A filter cartridge having a filter media with two opposing ends each being occluded by an adhesive edge seal.

Filter cartridge comprising filter media with adhesively edge-sealed ends, and method of making and using

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.

End of service life indicating systems for layered filter cartridges

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.

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Woodbury, MN, United States of America

Kevin A Frankel