Patent US2988429A successfully refreshed from Google Patents.
US2988429A
Expired / Lapsed
US
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Spiral contactor for solvent extraction column
Assignee: Individual
•
Filing: 1958-12-24
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Granted: 1961-06-13
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Expires: 1978-12-24
Abstract
No abstract record available.
Inventors
- 👤 Carl R Cooley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:48
CPC Classifications
G; G21; G21C; G21C19/00; G21C19/42; G21C19/44; G21C19/46; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0426; B01D11/043; B01D11/0438; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y02W; Y02W30/00; Y02W30/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PULSED-COLUMN EXTRATION APPARATUS, COMPRISING A COLUMN, A PLURALITY OF EQUALLY SPACED FLAT PERFORATED PLATES PERPENDICULAR TO THE WALL SURFACE OF SAID COLUMN EACH COVERING THE CROSS-SECTIONAL AREA OF SAID COLUMN, AN ORGANIC-PHASE-INGRESS LINE AND AN AQUEOUS-PHASE-EGRESS LINE AT ONE END OF SAID COLUMN, AND AQUEOUS-PHASE-INGRESS LINE AND AN ORGANIC-EGRESS LINE AT THE OTHER END THEREOF, LIQUID PULSE MEANS CONNECTED TO SAID COLUMN, AND AN IMPERFORATE SPIRAL RIBBON ALONG THE LENGTH OF SAID COLUMN, WHEREBY THE LENGTH OF THE PATH OF THE LIQUIDS IS INCREASED, SAID SPIRAL RIBBON BEING FORMED OF SPIRAL SECTIONS, EACH SECTION OF THE RIBBON EXTENDING ONLY THE DISTANCE BETWEEN TWO ADJACENT PERFORATED PLATES.
Claim 2
Dependent Claim
107 words
A PULSED-COLUMN EXTRATION APPARATUS, COMPRISING A COLUMN, A PLURALITY OF EQUALLY SPACED FLAT PERFORATED PLATES PERPENDICULAR TO THE WALL SURFACE OF SAID COLUMN EACH COVERING THE CROSS-SECTIONAL AREA OF SAID COLUMN, AN ORGANIC-PHASE-INGRESS LINE AND AN AQUEOUS-PHASE-EGRESS LINE AT ONE END OF SAID COLUMN, AND AQUEOUS-PHASE-INGRESS LINE AND AN ORGANIC-EGRESS LINE AT THE OTHER END THEREOF, LIQUID PULSE MEANS CONNECTED TO SAID COLUMN, AND AN IMPERFORATE SPIRAL RIBBON ALONG THE LENGTH OF SAID COLUMN, WHEREBY THE LENGTH OF THE PATH OF THE LIQUIDS IS INCREASED, SAID SPIRAL RIBBON BEING FORMED OF SPIRAL SECTIONS, EACH SECTION OF THE RIBBON EXTENDING ONLY THE DISTANCE BETWEEN TWO ADJACENT PERFORATED PLATES.
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) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |