Patent US2726767A successfully refreshed from Google Patents.
US2726767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Densifying of solids-liquid mixtures
Assignee: Individual
•
Filing: 1951-08-14
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Granted: 1955-12-13
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Expires: 1971-08-14
Abstract
No abstract record available.
Inventors
- 👤 Rakowsky Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:53
CPC Classifications
B; B04; B04C; B04C3/00; B04C5/00; B04C5/12; B04C5/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A METHOD OF TREATING A DILUTE SLURRY CONTAINING SMALL PARTICLES OF DIFFERING AVERAGE SPECIFIC GRAVITY TO PRODUCE A THICHENED PRODUCT FRACTION CONTAINING AS IT PRINCIPAL SOLID COMPONENT ONLY PARTICLES OF THE HIGHER SPECIFIC GRAVITIES, WHICH METHOD COMPRISES: ESTABLISHING A SPIRAL LAMINAR FLOW OF DILUTE SLURRY WITHIN A CONFINED SPACE; CAUSING SAID SPIRALLY-FLOWING SLURRY TO MOVE DOWNWARD THROUGH SAID CONFINED SPACE; DIVIDING THE DOWNWARD MOVEMENT INTO A CONFINED CENTRAL FLOW AND AN ANNULAR FLOW, BOTH FLOWS BEING CIRCULAR AND DOWNWARD; CONTINUING THE CONFINED CENTRAL FLOW DOWNWARD THROUGH AND AT A LOWER LEVEL OUT OF THE CONFINED SPACE; CONTINUING THE ANNULAR FLOW DOWNWARD AT INCREASING ANGULAR VELOCITIES THROUGH A ZONE OF DECREASING CROSS-SECTIONAL AREA TO A LEVEL BELOW THAT OF THE DISCHARGE OF THE CENTRAL FLOW; DISCHARGING THE ANNULAR
Claim 2
Independent Claim
127 words
A METHOD OF TREATING A DILUTE SLURRY CONTAINING SMALL PARTICLES OF DIFFERING AVERAGE SPECIFIC GRAVITY TO PRODUCE A THICHENED PRODUCT FRACTION CONTAINING AS IT PRINCIPAL SOLID COMPONENT ONLY PARTICLES OF THE HIGHER SPECIFIC GRAVITIES, WHICH METHOD COMPRISES: ESTABLISHING A SPIRAL LAMINAR FLOW OF DILUTE SLURRY WITHIN A CONFINED SPACE; CAUSING SAID SPIRALLY-FLOWING SLURRY TO MOVE DOWNWARD THROUGH SAID CONFINED SPACE; DIVIDING THE DOWNWARD MOVEMENT INTO A CONFINED CENTRAL FLOW AND AN ANNULAR FLOW, BOTH FLOWS BEING CIRCULAR AND DOWNWARD; CONTINUING THE CONFINED CENTRAL FLOW DOWNWARD THROUGH AND AT A LOWER LEVEL OUT OF THE CONFINED SPACE; CONTINUING THE ANNULAR FLOW DOWNWARD AT INCREASING ANGULAR VELOCITIES THROUGH A ZONE OF DECREASING CROSS-SECTIONAL AREA TO A LEVEL BELOW THAT OF THE DISCHARGE OF THE CENTRAL FLOW; DISCHARGING THE ANNULAR
References Cited (Backward Citations)
US1301544A
Cited
US1457110A
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US1470531A
Cited
US1825157A
Cited
US2252581A
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US2518084A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |