US3194400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal solvent extraction
Assignee: MALVERN INST FOR PSYCHIATRIC A
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Filing: 1960-12-21
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Granted: 1965-07-13
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Expires: 1980-12-21
Abstract
No abstract record available.
Inventors
- 👤 John F Herndon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:17
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/38; G01N30/90; G01N2030/381
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN A DEVICE FOR LIQUID CHROMATOGRAPHY, ROTATING MEANS HAVING A SUBSTANTIALLY VERTICAL AXIS OF ROTATION AND A PLURALITY OF SUBSTANTIALLY RADIALLY OUTWARDLY EXTENDING CHANNELS, SAID ROTATING MEANS BEING STATICALLY BALANCED ABOUT THE VERTICAL AXIS, EACH SAID CHANNEL HAVING PARALLEL LONGITUDINALLY EXTENDING SIDE WALLS, A BOTTOM FOR SUPPORT OF SEPARATING MEDIUM, AND AN OPEN TOP WHICH PERMITS EVAPORATION, AN ELONGATED STRIP OF SEPARATING MEDIUM RESTING ON THE BOTTOM OF EACH SAID CHANNEL AND EXTENDING ACROSS SAID CHANNEL, AND EACH SAID STRIP ENGAGING SAID WALLS OF THE CHANNEL AND COEXTENDING WITH SAID CHANNEL, AND MEANS FOR SUPPLYING A DEVELOPING LIQUID TO THE SEPARATING MEDIUM IN EACH CHANNEL AT RADIALLY INNER PORTIONS OF SAID STRIPS FOR FLOW TO OCCUR RADIALLY OUTWARDLY ALONG SAID STRIPS AND BETWEEN SAID WALLS OF SAID CHANNELS IN RESPONSE TO ROTATION OF SAID ROTATING MEANS.
Claim 2
Dependent Claim
136 words
IN A DEVICE FOR LIQUID CHROMATOGRAPHY, ROTATING MEANS HAVING A SUBSTANTIALLY VERTICAL AXIS OF ROTATION AND A PLURALITY OF SUBSTANTIALLY RADIALLY OUTWARDLY EXTENDING CHANNELS, SAID ROTATING MEANS BEING STATICALLY BALANCED ABOUT THE VERTICAL AXIS, EACH SAID CHANNEL HAVING PARALLEL LONGITUDINALLY EXTENDING SIDE WALLS, A BOTTOM FOR SUPPORT OF SEPARATING MEDIUM, AND AN OPEN TOP WHICH PERMITS EVAPORATION, AN ELONGATED STRIP OF SEPARATING MEDIUM RESTING ON THE BOTTOM OF EACH SAID CHANNEL AND EXTENDING ACROSS SAID CHANNEL, AND EACH SAID STRIP ENGAGING SAID WALLS OF THE CHANNEL AND COEXTENDING WITH SAID CHANNEL, AND MEANS FOR SUPPLYING A DEVELOPING LIQUID TO THE SEPARATING MEDIUM IN EACH CHANNEL AT RADIALLY INNER PORTIONS OF SAID STRIPS FOR FLOW TO OCCUR RADIALLY OUTWARDLY ALONG SAID STRIPS AND BETWEEN SAID WALLS OF SAID CHANNELS IN RESPONSE TO ROTATION OF SAID ROTATING MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |