US2502284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decarburization of steel
Assignee: Airco Inc
•
Filing: 1947-11-22
•
Granted: 1950-03-28
•
Expires: 1967-11-22
Abstract
No abstract record available.
Inventors
- 👤 George V Slottman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:30
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
THE METHOD OF DECARBURIZING STEEL WHICH COMPRISES SUBJECTING IT IN A MOLTEN STATE IN AN OPEN HEARTH FURNACE TO N INITIAL REFINING OPERATION WITH REDUCTION OF THE CARBON CONTENT THEREOF TO ABOUT 0.25%, WITHDRAWING THE INITIALLY DECARBURIZED STEEL IN A MOLTEN STATE FROM THE FURNACE, MAINTAINING THE WITHDRAWN STEEL IN A MOLTEN STATE, AND FORMING A FLOWING BODY OF THE INITIALLY DECARBURIZED AND MOLTEN STEEL WHICH IS RELATIVELY DEEP WITH RESPECT TO ITS CROSS-SECTIONAL AREA, AND THEREAFTER INTRODUCCING A GAS CONTAINING MORE THAN 45% OXYGEN INTO THE LOWER PORTION OF SAID RELATIVELY DEEP BODY OF MOLTEN STEEL UNTIL IT HAS REACTED WITH THE CARBON CONTENT OF THE MOLTEN STEEL SUFFICENTLY TO BRING ABOUT A FURTHER SUBSTANTIAL REDUCTION OF THE CARBON CONTENT THEREOF.
Claim 2
Independent Claim
122 words
THE METHOD OF DECARBURIZING STEEL WHICH COMPRISES SUBJECTING IT IN A MOLTEN STATE IN AN OPEN HEARTH FURNACE TO N INITIAL REFINING OPERATION WITH REDUCTION OF THE CARBON CONTENT THEREOF TO ABOUT 0.25%, WITHDRAWING THE INITIALLY DECARBURIZED STEEL IN A MOLTEN STATE FROM THE FURNACE, MAINTAINING THE WITHDRAWN STEEL IN A MOLTEN STATE, AND FORMING A FLOWING BODY OF THE INITIALLY DECARBURIZED AND MOLTEN STEEL WHICH IS RELATIVELY DEEP WITH RESPECT TO ITS CROSS-SECTIONAL AREA, AND THEREAFTER INTRODUCCING A GAS CONTAINING MORE THAN 45% OXYGEN INTO THE LOWER PORTION OF SAID RELATIVELY DEEP BODY OF MOLTEN STEEL UNTIL IT HAS REACTED WITH THE CARBON CONTENT OF THE MOLTEN STEEL SUFFICENTLY TO BRING ABOUT A FURTHER SUBSTANTIAL REDUCTION OF THE CARBON CONTENT THEREOF.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |