US Patent 7601262 - Nanoalumina submicron filter

http://www.freepatentsonline.com/7601262.html

This patent from Argonide teaches a nanofibrous filtration system useful for biological separation processes. Claim 1 reads:

1. A fibrous electropositive sorbent comprising a blended mixture of non-spherical nano alumina particles comprising AlOOH blended with and a second matrix solid, wherein said electropositive sorbent adsorbs at least one electropositive particle from a fluid.

US Patent 7390343 - Nanoalumina fiber water filter

http://www.freepatentsonline.com/7390343.html

This patent from Argonide Nanomaterials teaches a water filter that uses fibrous nanoalumina materials for higher efficiency contamination adsorption. Claim 1 reads:

1. A filtration device, said filtration device comprising at least one cartridge, each said cartridge having a support member that supports at least one fibrous structure, each said fibrous structure comprising nano alumina fibers and second fibers mixed with said nano alumina fibers, wherein said second fibers are arranged to create asymmetric pores.