US3201224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making cleaner alloy steels or the like
Assignee: Heppenstall Co
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Filing: 1962-11-23
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Granted: 1965-08-17
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Expires: 1982-11-23
Abstract
No abstract record available.
Inventors
- 👤 Howard G Grim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:17
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
METHOD OF MAKING ALLOY METALS, COMPRISING, IN COMBINATION, CONVENTIONALLY CHARGING AN ELECTRIC ARC FUNACE, MELTING AND REFINING THE CHARGE IN SAID FURNANCE TO PROVIDE A SLAG-COVERED BATH OF LIQUD METAL, ADDING SELECTED ALLOYING ADDITION AGENTS, REMOVING SAID SLAG, TAPPING OFF SAID MOLTEN METAL IN SAID BATH SUBSTANTIALLY AT FINISH TEMPERATURE BY TILTING SAID FURNACE TO PREDETERMINED EXTENT, COLLECTING SAID TAPPED METAL IN A POURING BOX HAVING A REGULATABLE BOTTOM OPENING, DISCHARGING METAL FROM THE BOTTOM OF SAID BOX INTO A PREVIOUSLY EVACUATED POURING LADLE, CONTINUING THE EVACUATION OF SAID LADLE DURING SAID DISCHARGE TO REMOVE OCCLUDED GASES FROM SAID METAL, RETURNING SAID DEGASSED METAL TO AN ELECTRIC ARC FURNACE, SAID LAST-NAMED FURNACE, ADDING FURTHER ALLOYING ADDITION AGENTS TO SAID DEGASSED METAL TO COMPLETE THE REFINING OF SAID DEGASSED METAL AND BRING IT TO FINISH SPECIFICATION, AND TAPPING SAID DEGASSED METAL AT SELECTED TAPPING TEMPERATURE.
Claim 2
Dependent Claim
144 words
METHOD OF MAKING ALLOY METALS, COMPRISING, IN COMBINATION, CONVENTIONALLY CHARGING AN ELECTRIC ARC FUNACE, MELTING AND REFINING THE CHARGE IN SAID FURNANCE TO PROVIDE A SLAG-COVERED BATH OF LIQUD METAL, ADDING SELECTED ALLOYING ADDITION AGENTS, REMOVING SAID SLAG, TAPPING OFF SAID MOLTEN METAL IN SAID BATH SUBSTANTIALLY AT FINISH TEMPERATURE BY TILTING SAID FURNACE TO PREDETERMINED EXTENT, COLLECTING SAID TAPPED METAL IN A POURING BOX HAVING A REGULATABLE BOTTOM OPENING, DISCHARGING METAL FROM THE BOTTOM OF SAID BOX INTO A PREVIOUSLY EVACUATED POURING LADLE, CONTINUING THE EVACUATION OF SAID LADLE DURING SAID DISCHARGE TO REMOVE OCCLUDED GASES FROM SAID METAL, RETURNING SAID DEGASSED METAL TO AN ELECTRIC ARC FURNACE, SAID LAST-NAMED FURNACE, ADDING FURTHER ALLOYING ADDITION AGENTS TO SAID DEGASSED METAL TO COMPLETE THE REFINING OF SAID DEGASSED METAL AND BRING IT TO FINISH SPECIFICATION, AND TAPPING SAID DEGASSED METAL AT SELECTED TAPPING TEMPERATURE.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |