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.