US3323899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting process for ferroalloys
Assignee: Elkem Metals Co LP
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Filing: 1964-03-10
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Granted: 1967-06-06
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Expires: 1984-03-10
Abstract
No abstract record available.
Inventors
- 👤 William D Forgeng
- 👤 John W Farrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:13
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS FOR CASTING AND PARTICULATING FERROALLOYS WHICH COMPRISES: (1) PROVING MOLTEN FERROALLOY MATERIAL, (2) POURING ONLY A PREDETERMINED AMOUNT OF MOLTEN FERROALLOY INTO A VESSEL TO PROVIDE A PREDETERMINED DEPTH OF MOLTEN METAL THEREIN, (3) ALLOWING SAID MOLTEN FERROALLOY TO SOLIDIFY AND FROM AN OXIDE LAYER AT ITS UPPER SURFACE, (4) REPEATING THE FOREGOING STEPS TO PROVIDE A PLURALITY OF SOLIDIFIED FERROALLOY LAYERS, (5) REMOVING THE FERROALLOY FROM THE VESSEL IN WHICH IT HAS SOLIDIFIED, (6) SEPARATING SAID LAYERS AND (7) CRUSHING SAID LAYERS TO PROVIDE PARTICULATED FERFOALLOY.
Claim 2
Dependent Claim
89 words
A PROCESS FOR CASTING AND PARTICULATING FERROALLOYS WHICH COMPRISES: (1) PROVING MOLTEN FERROALLOY MATERIAL, (2) POURING ONLY A PREDETERMINED AMOUNT OF MOLTEN FERROALLOY INTO A VESSEL TO PROVIDE A PREDETERMINED DEPTH OF MOLTEN METAL THEREIN, (3) ALLOWING SAID MOLTEN FERROALLOY TO SOLIDIFY AND FROM AN OXIDE LAYER AT ITS UPPER SURFACE, (4) REPEATING THE FOREGOING STEPS TO PROVIDE A PLURALITY OF SOLIDIFIED FERROALLOY LAYERS, (5) REMOVING THE FERROALLOY FROM THE VESSEL IN WHICH IT HAS SOLIDIFIED, (6) SEPARATING SAID LAYERS AND (7) CRUSHING SAID LAYERS TO PROVIDE PARTICULATED FERFOALLOY.
References Cited (Backward Citations)
US2853767A
Cited
GB956678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |