Liquid purification or separation – Processes – Ion exchange or selective sorption
Reexamination Certificate
2005-01-04
2005-01-04
Drodge, Joseph (Department: 1723)
Liquid purification or separation
Processes
Ion exchange or selective sorption
C210S500100, C210S505000, C210S510100, C423S627000, C423S629000, C436S177000
Reexamination Certificate
active
06838005
ABSTRACT:
Aluminum hydroxide fibers approximately 2 nanometers in diameter and with surface areas ranging from 200 to 650 m2/g have been fount to be highly electropositive. When dispersed in water they are able to attach to and retain electronegative particles. When combined into a composite filter with other fibers or particles they can filter bacteria and nano size particulates such as viruses and colloidal particles at high flux through the filter. Such filters can be used for purification and sterilization of water, biological, medical and pharmaceutical fluids, and as a collector/concentrator for detection and assay of mirobes and viruses. The alumina fibers are also capable of filtering sub-micron inorganic and metallic particles to produce ultra pure water. The fibers are suitable as a substrate for growth of cells. Macromolicules such as proteins may be separated from each other based on their electronegative charges.
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Kaledin Leonid
Tepper Frederick
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Drodge Joseph
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