US2758783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal countercurrent exchange device
Assignee: WLADZIA G PODBIELNIAK
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Filing: 1952-11-05
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Granted: 1956-08-14
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Expires: 1972-11-05
Abstract
No abstract record available.
Inventors
- 👤 Walter J Podbielniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:21
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
150 words
IN APPARATUS FOR COUNTERCURRENT EXCHANGE BETWEEN AT LEAST PARTIALLY IMMISCIBLE LIQUIDS OF DIFFERENT DENSITIES, A ROTOR HAVING TWO SIDE PLATES AND A PERIPHERAL CYLINDRICAL MEMBER MAKING UP A ROTOR CHAMBER, MEANS FOR SUPPLYING HEAVIER LIQUID TO AND REMOVING LIGHTER LIQUID FROM THE INNER PORTION OF SAID ROTOR CHAMBER AND MEANS FOR SUPPLYING LIGHTER LIQUID TO AND REMOVING HEAVIER LIQUID FROM THE OUTER PORTION OF SAID ROTOR CHAMBER, SAID MEANS FOR REMOVING HEAVIER LIQUIDS COMPRISING A SPILL-OVER PLATE SPACED FROM AND PARALLEL TO EACH OF SAID ROTOR SIDE PLATES TO FORM INTER-PLATE SPACES BETWEEN SAID SIDE PLATES AND SAID SPILL-OVER PLATES FOR THE DISCHARGE OF THE HEAVIER LIQUID FROM THE ROTOR CHAMBER, AND A PLURALITY OF CYCLOIDAL VANES ON EACH OF SAID SPILL-OVER PLATES IN SAID INTERPLATE SPACES THE CYCLOIDAL VANES ON ONE OF SAID SPILL-OVER PLATES BEING MIRROR IMAGES OF THE CYCLOIDAL VANES ON THE OTHER OF SAID SPILL-OVER 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) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |