US3207310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sump level control for hydraulic classifier circuit
Assignee: Republic Steel Corp
•
Filing: 1962-09-25
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Granted: 1965-09-21
•
Expires: 1982-09-25
Abstract
No abstract record available.
Inventors
- 👤 Lloyd A Yesberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:00
CPC Classifications
B; B03; B03B; B03B11/00; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86187
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
IN A HYDRAULIC CLASSIFICATION CIRCUIT, A SUMP FOR RECEIVING AN IRON-RICH SLURRY FROM A SEPARATOR; SAID SUMP HAVING OVERFLOW MEANS FOR MAINTAINING A SELECTED LEVEL OF SAID SLURRY; PUMP MEANS CONTINUOUSLY REMOVING SAID SLURRAY FROM SAID SUMP BELOW SAID SELECTED LEVEL; A CONTROL TANK; SAID TANK HAVING OVERFLOW MEANS FOR MAINTAINING A LEVEL OF LIQUID IN SAID TANK SUBSTANTIALLY AT SAID SELECTED LEVEL; MEANS FORCEFULLY INTRODUCING WATER INTO SAID TANK AT A RATE OF FLOW IN EXCESS OF THE RATE OF FLOW OF SAID PUMP MEANS; AND MEANS AFFORDING LIQUID COMMUNICTION BETWEEN SAID SUMP AND SAID TANK BELOW SAID SELECTED LEVEL.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |