Fluid treatment elements

Details Fluid treatment elements Fluid treatment elements

2006-09-06

2008-11-25

Savage, Matthew O (Department: 1797)

Liquid purification or separation

Electrical insulating or electricity discharging

C210S489000, C210S493100, C210S505000, C210S508000

Reexamination Certificate

active

07455768

ABSTRACT:
Fluid treatment elements substantially inhibit electrical charge imbalances and/or build-ups of electrical charges. A fluid treatment element may comprise a multilayer composite including an electrically conductive fibrous matrix, having an upstream side and a downstream side, disposed on a porous substrate, also having an upstream side and a downstream side, which supports the fibrous matrix. The fibrous matrix may include a combination of conductive and nonconductive fibers, wherein the conductive fibers include metal, carbon, or conductive polymer fibers and substantially inhibit an electrical charge and/or build-up of electrical charge. The conductive fibers of the electrically conductive fibrous matrix may comprise less than about 50% by weight of the conductive and nonconductive fibers and may have diameters in the range from about 1 μm or less to about 10 μm. The multilayer composite may also include a drainage layer positioned along one of the upstream side of the fibrous matrix and the downstream side of the porous substrate.

REFERENCES:
patent: 3246767 (1966-04-01), Pall et al.
patent: 3933643 (1976-01-01), Colvin et al.
patent: 5252207 (1993-10-01), Miller et al.
patent: 5368913 (1994-11-01), Ortega

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