US3817744A
Expired / Lapsed
US
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Method for cooling a tuyere of a refining converter
Assignee: CREUSOT LOIRE SOC ANONYME FR
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Filing: 1972-08-14
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Granted: 1974-06-18
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Expires: 1992-08-14
Abstract
Abstract A METHOD FOR COOLING THE TIP OF A TUYERE USED FOR INTRODUCING AN OXIDIZING GAS INTO A MOLTEN METAL BATH OF A BOTTOM-BLOWN REFINING CONVERTER. THE METHOD COMPRISES INJECTING A COOLING AGENT INTO THE CONVERTER PERIPHERALLY OF THE TUYERE, WHERE THE COOLING AGENT IS A LIQUID UP TO THE TIP OF THE TUYERE.
Inventors
- 👤 M Queleu
- 👤 E Sprunck
- 👤 P Leroy
- 👤 M Gombert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:17
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/48; C21C5/30; C21C5/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |