US3030203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing steel
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1960-10-10
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Granted: 1962-04-17
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Expires: 1980-10-10
Abstract
No abstract record available.
Inventors
- 👤 Glenn E Hilliard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:50
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/32; C21C5/005; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
A METHOD OF REFINING MOLTEN IRON WHICH COMPRISES THE STEPS OF, PREPARING A BATH OF MOLTEN IMPURE IRON IN THE PRESENCE OF A SLAG IN A VERTICALLY EXTENDING VESSEL HAVING A REFACTORY LINING AND DISPOSED TO BE TILTED THROUGH A PLURALITY OF POSITION FROM THE VERTICAL, INSERTING A LANCE BERTICALLY WITHIN THE VERTICLLY EXTENDING VESSEL WITH THE LOWER END OF THE LANCE TERMINATING FROM 6 TO 80 INCHES ABOVE THE SLAG COVER ON SAID MOLTEN IRON, BLOWING OXYGEN THROUGH THE VERTICAL LANCE VERTICALLY DOWNWARDLY THROUGH THE SLAG COVER ONTO AND BELOW THE SURFACE OF THE BATH AT SUBSTANILLY THE CENTRAL PORTION THEREOF TO EFFECT A REACTION OF THE OXYGEN WITH SAID BATH SO AS TO EFFECT A OXIDATION OF CARBON AND THE OXIDIZABLE IMPURITIES OF SAID BATH, CONTINUING SAID VERTICAL BLOWING TO REDUCE THE CARBON CONTENT OF SAID MOLTEN IRON TO WITHIN THE RANGE OF 0.06 TO 0.20%, INTERRUPTING THE FLOW OF OXYGEN THROUGH THE VERTICAL LANCE, TILTING THE VESSEL TO A PREDETERMINED ANGLE AWAY FROM THE VERTICAL TO ENLARGE THE SURFACE AREA OF THE MOLTEN IRON AND SLAG COVER CONTAINED THEREIN, INSERTONG A SUBMERGIBLE LANCE THROUGH THE SLAG COVER INTO
Claim 2
Independent Claim
191 words
A METHOD OF REFINING MOLTEN IRON WHICH COMPRISES THE STEPS OF, PREPARING A BATH OF MOLTEN IMPURE IRON IN THE PRESENCE OF A SLAG IN A VERTICALLY EXTENDING VESSEL HAVING A REFACTORY LINING AND DISPOSED TO BE TILTED THROUGH A PLURALITY OF POSITION FROM THE VERTICAL, INSERTING A LANCE BERTICALLY WITHIN THE VERTICLLY EXTENDING VESSEL WITH THE LOWER END OF THE LANCE TERMINATING FROM 6 TO 80 INCHES ABOVE THE SLAG COVER ON SAID MOLTEN IRON, BLOWING OXYGEN THROUGH THE VERTICAL LANCE VERTICALLY DOWNWARDLY THROUGH THE SLAG COVER ONTO AND BELOW THE SURFACE OF THE BATH AT SUBSTANILLY THE CENTRAL PORTION THEREOF TO EFFECT A REACTION OF THE OXYGEN WITH SAID BATH SO AS TO EFFECT A OXIDATION OF CARBON AND THE OXIDIZABLE IMPURITIES OF SAID BATH, CONTINUING SAID VERTICAL BLOWING TO REDUCE THE CARBON CONTENT OF SAID MOLTEN IRON TO WITHIN THE RANGE OF 0.06 TO 0.20%, INTERRUPTING THE FLOW OF OXYGEN THROUGH THE VERTICAL LANCE, TILTING THE VESSEL TO A PREDETERMINED ANGLE AWAY FROM THE VERTICAL TO ENLARGE THE SURFACE AREA OF THE MOLTEN IRON AND SLAG COVER CONTAINED THEREIN, INSERTONG A SUBMERGIBLE LANCE THROUGH THE SLAG COVER INTO
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) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |