US4632762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal chromatography
Assignee: Individual
•
Filing: 1985-05-28
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Granted: 1986-12-30
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Expires: 2005-05-28
Abstract
Abstract Separation of liquid mixtures is achieved through a chromatographic method by employing centrifugal force in combination with dielectrophoretic force. The dielectrophoretic force is generated by electrostatically charging a flat rotatable surface. The resulting non-uniform electrical field acts on the liquid that is applied to the surface.
Inventors
- 👤 Arnold Ramsland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:41
CPC Classifications
B; B01; B01D; B01D15/00; B01D15/08; B01D15/10; B01D15/18; B01D15/1892; B01D15/26; B01D15/38; B01D15/3861; B01D15/3885; B01D57/00; B01D57/02; B01D15/14; B01D15/1864; B01D15/1885; G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/38; G01N2030/381
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
88 words
A chromatographic process which comprises: separating the major component of a mixture of two or more liquids having different affinities for electrostatic charge while precluding the need for utilizing a mobile phase by applying at least partially an electrostatic charge to a flat, smooth, non-absorbent disk, rotating said disk in a horizontal plane, feeding a mixture of at least two such liquids on to the inner surface of said disk and collecting the respective liquids thrown from the outer edge of the rotating disk at different time intervals.
Claim 2
Dependent Claim
88 words
A chromatographic process which comprises: separating the major component of a mixture of two or more liquids having different affinities for electrostatic charge while precluding the need for utilizing a mobile phase by applying at least partially an electrostatic charge to a flat, smooth, non-absorbent disk, rotating said disk in a horizontal plane, feeding a mixture of at least two such liquids on to the inner surface of said disk and collecting the respective liquids thrown from the outer edge of the rotating disk at different time intervals.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein the liquid mixtures are selected from the group consisting of ethanol and water, methanol and water, and acetic acid and water.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein the disk has a surface of mylar.
Claim 5
Independent Claim
80 words
An apparatus comprising means for separating two or more components of a liquid mixture having different affinities for an electrostatically charged surface while precluding the need for utilizing a mobile phase component utilizing a flat, smooth, non porous disk, means for rotating said disk in a generally horizontal plane, means for applying said liquid mixture onto the inner surface of said disks and means for collecting the liquid as it leaves the outer edge of the disk at different times.
Claim 6
Independent Claim
80 words
An apparatus comprising means for separating two or more components of a liquid mixture having different affinities for an electrostatically charged surface while precluding the need for utilizing a mobile phase component utilizing a flat, smooth, non porous disk, means for rotating said disk in a generally horizontal plane, means for applying said liquid mixture onto the inner surface of said disks and means for collecting the liquid as it leaves the outer edge of the disk at different times.
Claim 7
Dependent Claim
13 words
The apparatus of claim 4 wherein the disk has a surface of mylar.
Claim 8
Dependent Claim
12 words
The apparatus of claim 4 wherein a plurality of disks are utilized.
Claim 9
Dependent Claim
19 words
The apparatus of claim 6 wherein the gap between the disks is from about 0.005 to about 0.015 inches.
Claim 10
Dependent Claim
19 words
The apparatus of claim 6 wherein the means for collecting the liquid is only movable in the vertical direction.
References Cited (Backward Citations)
US3395093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |