Patent US3130252A successfully refreshed from Google Patents.
US3130252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lances for treatment of metal baths
Assignee: Arcelor Luxembourg SA
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Filing: 1960-02-19
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Granted: 1964-04-21
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Expires: 1980-02-19
Abstract
No abstract record available.
Inventors
- 👤 Metz Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:01
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A DOUBLE LANCE FOR INJECTION OF AT LEAST ONE GAS INTO OR ON TOP OF A METAL MELT, INCLUDING AN INNR TUBULAR MEMBER DEFINING AN INSIDE DUCT FOR PASSAGE OF GAS THERETHROUGH, AN OUTER TUBULAR MEMBER CONCENTRIC WITH SAID INNER MEMBER AND DEFINING THEREWITH AN OUTSIDE DUCT FOR PASSAGE OF GAS, AND MEANS TO ALLOW GAS TO FLOW FROM SAID OUTSIDE DUCT INCLUDING THE PROVISION OF AT LEAST ONE PASSAGE BUT WHEREIN SAID OUTSIDE DUCT IS SUBSTANTIALLY FREE OF CLOGGING BY METAL MELT OR SLAG MATERIALS WHEN GAS IS NOT FLOWING THROUGH SAIS PASSAGE, THE MEANS INCLUDING A PLURALITY OF SECONDARY GAS JETS IN THE INSIDE DUCT AT THE OUTLET END THEREOF, AND EACH SECONDARY GAS JET BEING CONVERGENT-DIVERGENT IN CROSS SECTION.
Claim 2
Dependent Claim
122 words
A DOUBLE LANCE FOR INJECTION OF AT LEAST ONE GAS INTO OR ON TOP OF A METAL MELT, INCLUDING AN INNR TUBULAR MEMBER DEFINING AN INSIDE DUCT FOR PASSAGE OF GAS THERETHROUGH, AN OUTER TUBULAR MEMBER CONCENTRIC WITH SAID INNER MEMBER AND DEFINING THEREWITH AN OUTSIDE DUCT FOR PASSAGE OF GAS, AND MEANS TO ALLOW GAS TO FLOW FROM SAID OUTSIDE DUCT INCLUDING THE PROVISION OF AT LEAST ONE PASSAGE BUT WHEREIN SAID OUTSIDE DUCT IS SUBSTANTIALLY FREE OF CLOGGING BY METAL MELT OR SLAG MATERIALS WHEN GAS IS NOT FLOWING THROUGH SAIS PASSAGE, THE MEANS INCLUDING A PLURALITY OF SECONDARY GAS JETS IN THE INSIDE DUCT AT THE OUTLET END THEREOF, AND EACH SECONDARY GAS JET BEING CONVERGENT-DIVERGENT IN CROSS SECTION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |