US3567202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for injection by top-blowing into a metal bath
Assignee: Arcelor Luxembourg SA
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Filing: 1967-10-02
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Granted: 1971-03-02
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Expires: 1987-10-02
Abstract
Abstract IN REFINING A FERROUS MELT IN A METALLURGICAL FURNACE, A PRIMARY STREAM OF OXIDIZING FLUIS IS TRAINED UPON THE BATH SURFACE FROM A LANCE WHICH ALSO HAS MEANS FOR EMITTING A SECONDARY STREAM OF OXIDIZING FLUID, THE LATTER ENVELOPING THE PRIMARY STREAM AND SWIRLING AROUND IT, WITH OR WITHOUT INJECTION OF SOLID PARTICLES ENTRAINED BY THE PRIMARY STREAM.
Inventors
- 👤 Robert Mercatoris
- 👤 Joseph Nepper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:22
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/32; C21C5/42; C21C5/46; C21C5/4606
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |