Liquid purification or separation – Liquid as separating medium
Reexamination Certificate
2009-01-30
2010-10-26
Griffin, Walter D (Department: 1797)
Liquid purification or separation
Liquid as separating medium
C210S538000, C422S261000
Reexamination Certificate
active
07819259
ABSTRACT:
Systems and methods are described for separating components of aqueous mixtures, including aqueous solutions and suspensions. In one implementation, an apparatus flows the aqueous mixture over a hydrophilic surface to form a first region of purified water and a second region of at least one concentrated non-aqueous component. The apparatus can draw off either the purified water or the concentrated non-aqueous components. In one implementation, an array of tubules performs the differential extraction. In another implementation, various hydrophilic and/or hydrophobic surfaces are disposed in multiple differential extractors and some effluents may be recycled to perform complex assaying and separation. In a further implementation, an apparatus can draw off purified water just beneath the air-water interface.
REFERENCES:
patent: 2002/0058173 (2002-05-01), Dove
patent: 2003/0185956 (2003-10-01), Gradley
patent: 2007/0163967 (2007-07-01), Pollack
Zheng et al., “Long-range forces extending from polymer-gel surfaces”, Physical Review E 68, 031408 (2003), received May 7, 2003; published Sep. 29, 2003.
Allen Cameron J
Graybeal Jackson LLP
Griffin Walter D
Pollack Gerald H.
Wiklof Christopher A.
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