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US 8,303,693 B2Granted
Nanofiber filter facemasks and cabin filters
AssigneeThe Hong Kong Polytechnic University
InventorWallace W. Leung
Life of this patent
Estimating the term…
Abstract
A filtration medium includes a fine filter layer having a plurality of nanofibers and a coarse filter layer having a plurality of microfibers attached to the fine filter layer. The coarse filter layer is positioned proximal to a direction of fluid flow, and the fine filter layer is positioned distal to the direction of fluid flow.
Claims38
A filtration medium, comprising:
- a fine filter layer comprising a plurality of nanofibers;
- and
- a coarse filter layer comprising a plurality of microfibers, the coarse filter layer attached to said fine filter layer,
- wherein said coarse filter layer is positioned proximal to a direction of fluid flow, and said fine filter layer is positioned distal to said direction of fluid flow.
1 more element
A method of making a filtration medium, comprising:
- providing a fine filter layer comprising a plurality of nanofibers;
- providing a coarse filter layer comprising a plurality of microfibers;
- and
- attaching said fine filter layer to said coarse filter layer,
- wherein said coarse filter layer is positioned proximal to a direction of fluid flow and said fine filter layer is positioned distal to said direction of fluid flow.
2 more elements
Dependencies are inferred from the claim text.