Patent US3236630A successfully refreshed from Google Patents.
US3236630A
Expired / Lapsed
US
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Oxygen steelmaking
Assignee: United States Steel Corp
•
Filing: 1961-10-23
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Granted: 1966-02-22
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Expires: 1981-10-23
Abstract
No abstract record available.
Inventors
- 👤 Raymond C Stephan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:56
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/32; Y; Y10; Y10S; Y10S261/00; Y10S261/09; Y10S261/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A METHOD OF PRODUCING STEEL HAVING A CARBON CONTENT OF ABOUT .05% BY BLOWING OXYGEN AGAINST THE TOP SURFACE ONLY OF A BATH OF MOLTEN FERROUS COMPRISING ANALYZING THE OFF-GAS FROM THE REFINING REACTION FOR OXYGEN AND
Claim 2
Independent Claim
37 words
A METHOD OF PRODUCING STEEL HAVING A CARBON CONTENT OF ABOUT .05% BY BLOWING OXYGEN AGAINST THE TOP SURFACE ONLY OF A BATH OF MOLTEN FERROUS COMPRISING ANALYZING THE OFF-GAS FROM THE REFINING REACTION FOR OXYGEN AND
References Cited (Backward Citations)
US2207309A
Cited
US2750280A
Cited
US2831467A
Cited
US2936230A
Cited
US2800631A
Cited
US2883279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |