US3076703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of steel
Assignee: Arcelor Luxembourg SA
•
Filing: 1959-04-27
•
Granted: 1963-02-05
•
Expires: 1979-04-27
Abstract
No abstract record available.
Inventors
- 👤 Metz Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:33
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
IN THE MANUFACTURE OF STEEL WHICH INCLUDES BLOWING PURE OXYGEN INTO A MELT OF PIG IRON IN ORDER TO DEPHOSPHORIZE SAID IRON, IN COMBINATION THEREWITH THE STEP STIRRING AND FURTHER DEPHOSPHORIZING OF SAID MELT AFTER THE BLOWING OF OXYGEN IS FINISHED, BUT BEFORE A FINAL SLAGGING OF THE MELT, BY BLOWING INTO THE MELT AN OXIDIZING GAS CONTAINING LESS THAN SUBSTANTIALLY 35% FREE OXYGEN.
Claim 2
Dependent Claim
64 words
IN THE MANUFACTURE OF STEEL WHICH INCLUDES BLOWING PURE OXYGEN INTO A MELT OF PIG IRON IN ORDER TO DEPHOSPHORIZE SAID IRON, IN COMBINATION THEREWITH THE STEP STIRRING AND FURTHER DEPHOSPHORIZING OF SAID MELT AFTER THE BLOWING OF OXYGEN IS FINISHED, BUT BEFORE A FINAL SLAGGING OF THE MELT, BY BLOWING INTO THE MELT AN OXIDIZING GAS CONTAINING LESS THAN SUBSTANTIALLY 35% FREE OXYGEN.
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) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |