US3605862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for feedback control of mold level in a continuous casting process utilizing a pour box
Assignee: United States Steel Corp
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Filing: 1969-05-08
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Granted: 1971-09-20
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Expires: 1989-05-08
Abstract
Abstract A SYSTEM FOR CONTROLLING THE MOLD LIQUID LEVEL IN A CONTINUOUS CASTING PROCESS WITH A POUR BOX AND A DEGASSING VESSEL BETWEEN A HOT METAL LADLE AND THE MOLD. THE CONTROLLER CYCLES THE PUR BOX LEVEL WITHIN A PREDETERMINED BAND BY OPENING THE LADLE STOPPER WHEN THE LIQUID LEVEL REACHES THE LOWER LIMIT AND CLOSING THE LADLE STOPPER WHEN THE LIQUID LEVEL REACHES THE UPER LIMIT. THE LEVEL OF THE BAND IS RESET EACH CYCLE ACCORDING TO THE AMOUNT OF METAL CAST DURING THE PREVIOUS CYCLE.
Inventors
- 👤 Ronald G Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:31
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/16; B22D11/20; B22D11/201; B22D11/205; G; G05; G05D; G05D9/00; G05D9/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |