Patent US5112302A successfully refreshed from Google Patents.
US2779731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure flotation
Assignee: PROCESS ENGINEERS Inc
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Filing: 1953-06-11
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Granted: 1957-01-29
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Expires: 1973-06-11
Abstract
No abstract record available.
Inventors
- 👤 Earl M Kelly
- 👤 Arthur M Kivari
- 👤 Lawrence S Farrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:50
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/16; B03D1/1412; B03D1/1443; B03D1/1456; B03D1/1462
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
198 words
IN PRESSURE FLOTATION APPARATUS IN WHICH SOLIDS SUSPENDED IN A LIQUID POOL ARE BUOYED UP OUT OF THE POOL BY GAS COMING OUT OF SOLUTION THEREIN TO CONCENTRATE IN THE UPPER PORTION OF THE POOL ADJACENT ITS UPPER SURFACE, THE COMBINATION WHICH COMPRISES AN UPRIGHT TANK, A BAFFLE DISPOSED IN THE TANK AND HAVING BOTTOM AND SIDES, THE SIDES BEING SPACED FROM THE SIDES OF THE TANK AND THE BOTTOM BEING SPACED FROM THE BOTTOM OF THE TANK SO THAT THE UPPER PORTION OF THE POOL IS CONFINED IN AN ANNULUS WHILE THE LOWER PORTION OF THE POOL UNDERLIES THE BOTTOM OF THE BAFFLE, A TROUGH DISPOSED APPROXIMATELY RADIALLY FROM THE TANK SIDES TO THE BAFFLE IN THE UPPER PORTION OF THE ANNULUS, SKIMMING MEANS DISPOSED ACROSS THE ANNULUS AT APPROXIMATELY THE LEVEL OF THE TROUGH FOR MOVING FLOATED SOLIDS INTO THE TROUGH, MEANS FOR ROTATING THE SKIMMING MEANS AROUND A VERTICAL AXIS PASSING THROUGH THE BAFFLE, AND A DISTRIUBTOR DISPOSED APPROXIMATELY RADIALLY IN THE TANK AT ABOUY THE LEVEL OF THE BOTTOM OF THE BAFFLE FOR ADMITTING A GAS-CHARGED LIQUID STREAM CONTAINING THE SUSPENDED SOLIDS INTO THE POOL IN THE DIRECTION OF ROTATION OF THE SKIMMING MEANS.
Claim 2
Dependent Claim
198 words
IN PRESSURE FLOTATION APPARATUS IN WHICH SOLIDS SUSPENDED IN A LIQUID POOL ARE BUOYED UP OUT OF THE POOL BY GAS COMING OUT OF SOLUTION THEREIN TO CONCENTRATE IN THE UPPER PORTION OF THE POOL ADJACENT ITS UPPER SURFACE, THE COMBINATION WHICH COMPRISES AN UPRIGHT TANK, A BAFFLE DISPOSED IN THE TANK AND HAVING BOTTOM AND SIDES, THE SIDES BEING SPACED FROM THE SIDES OF THE TANK AND THE BOTTOM BEING SPACED FROM THE BOTTOM OF THE TANK SO THAT THE UPPER PORTION OF THE POOL IS CONFINED IN AN ANNULUS WHILE THE LOWER PORTION OF THE POOL UNDERLIES THE BOTTOM OF THE BAFFLE, A TROUGH DISPOSED APPROXIMATELY RADIALLY FROM THE TANK SIDES TO THE BAFFLE IN THE UPPER PORTION OF THE ANNULUS, SKIMMING MEANS DISPOSED ACROSS THE ANNULUS AT APPROXIMATELY THE LEVEL OF THE TROUGH FOR MOVING FLOATED SOLIDS INTO THE TROUGH, MEANS FOR ROTATING THE SKIMMING MEANS AROUND A VERTICAL AXIS PASSING THROUGH THE BAFFLE, AND A DISTRIUBTOR DISPOSED APPROXIMATELY RADIALLY IN THE TANK AT ABOUY THE LEVEL OF THE BOTTOM OF THE BAFFLE FOR ADMITTING A GAS-CHARGED LIQUID STREAM CONTAINING THE SUSPENDED SOLIDS INTO THE POOL IN THE DIRECTION OF ROTATION OF THE SKIMMING MEANS.
References Cited (Backward Citations)
US1662702A
Cited
US864856A
Cited
US2263167A
Cited
US2324400A
Cited
US2418950A
Cited
US2446655A
Cited
GB659978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |