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US 5,000,848 AGranted
Rotary filtration device with hyperphilic membrane
AssigneeMembrex, Inc.
InventorsLeonard T. Hodgins, Edgar Samuelsen
Life of this patent
Estimating the term…
Abstract
A rotary filtration device having at least two members, one at least partially within the other to define a fluid gap therebetween, is disclosed. One or more filters are located on one or more of the members facing the fluid gap. Sufficient uncharged hydrophilic polar groups, preferably uncharged substituted amide groups, are located on the surface of the filter to render the surface hydrophilic.
Claims29
A rotary filtration device comprising:
- (a) an outer member having an inner surface;
- (b) an inner member having an outer surface and mounted at least partially within the outer member to define a fluid gap between the inner surface of the outer member and the outer surface of the inner member;
- (c) means for rotating the outer member or the inner member or both;
- and
- (d) filter means for filtering fluid in the fluid gap, the filter means being located on the inner surface of the outer member or on the outer surface of the inner member or on both and comprising molecules of a suitable polymer that provides solely on the surface of the filter sufficient uncharged substituted amide groups to render the surface hydrophilic.
2 more elements
A rotary filtration device comprising:
- (a) an outer member having an inner surface;
- (b) an inner member having an outer surface and mounted at least partially within the outer member to define a fluid gap between the inner surface of the outer member and the outer surface of the inner member;
- (c) means for rotating the outer member or the inner member or both;
- and
- (d) filter means for filtering fluid in the fluid gap, the filter means being located on the inner surface of the outer member or on the outer surface of the inner member or on both and comprising molecules of a suitable polymer that provides solely on the surface of the filter sufficient uncharged hydrophilic polar groups to render the surface hydrophilic, the polar groups having been obtained by derivatization of reactive pendent groups of the polymer.
2 more elements
Dependencies are inferred from the claim text.