Patent ID: 8556089

Claim:
A filter element comprising a filter media, the media comprising a first and second opposite flow faces and a plurality of flutes, the media comprising; (i) each of said flutes having a first open end portion adjacent to said first flow face and a second open end portion adjacent to said second flow face; (ii) said media comprising a non-woven filter substrate and formed on the substrate a substantially continuous nanofiber layer having a fiber diameter of about 0.001 to 0.5 micron and a super absorbent wherein the super absorbent comprises 0.1 to 50 vol % of the layer, the layer having a thickness of about 0.0001 to 1 cm and the super absorbent comprises about 0.001 to 10 kg per square meter of the layer; wherein selected ones of said flutes being open at said first end portion and closed at said second end portion; and selected ones of said flutes being closed at said first end portion and open at said second end portion provides a fluid path through the fluted layer.