US2644746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for refining steel with pure oxygen
Assignee: Voestalpine AG
•
Filing: 1950-08-22
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Granted: 1953-07-07
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Expires: 1970-08-22
Abstract
No abstract record available.
Inventors
- 👤 Hauttmann Hubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:10
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PROCESS FOR REFINING STEEL WITH PURE OXYGEN, COMPRISING DIRECTING A STREAM OF OXYGEN ONTO THE SURFACE OF THE MELT AND ROTATING SAID STREAM ABOUT ITS AXIS TO CAUSE ROTATION OF THE SLAG AT THE POINT OF IMPACT AND FREE THE SURFACE OF THE METAL TO ENABLE DIRECT CONTACT BETWEEN THE OXYGEN AND THE MELTED METAL.
Claim 2
Dependent Claim
56 words
A PROCESS FOR REFINING STEEL WITH PURE OXYGEN, COMPRISING DIRECTING A STREAM OF OXYGEN ONTO THE SURFACE OF THE MELT AND ROTATING SAID STREAM ABOUT ITS AXIS TO CAUSE ROTATION OF THE SLAG AT THE POINT OF IMPACT AND FREE THE SURFACE OF THE METAL TO ENABLE DIRECT CONTACT BETWEEN THE OXYGEN AND THE MELTED METAL.
References Cited (Backward Citations)
US33949A
Cited
US1032654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |