Patent US1638805A successfully refreshed from Google Patents.
US3373794A
Expired / Lapsed
US
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Ferroalloy casting process
Assignee: Elkem Metals Co LP
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Filing: 1966-02-01
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Granted: 1968-03-19
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Expires: 1986-02-01
Abstract
No abstract record available.
Inventors
- 👤 Richard A Crago
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:11
CPC Classifications
B; B22; B22D; B22D3/00; B22D21/00; B22D21/002; B22D21/007; B22D25/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR CASTING MAGNESIUM FERROSILICON WHICH COMPRISES PREPARING MOLTEN MAGNESIUM FERROSILICON, POURING THE MOLTEN MAGNESIUM FERROSILICON INTO A CHILL, PRO VIDING A METAL MEMBER IN CONTACT WITH THE UPPER SURFACE OF THE MOLTEN MAGNESIUM FERROSILICON IN THE CHILL, SAID METAL MEMBER SUBSTANTIALLY COVERING THE UPPER SURFACE OF THE MOLTEN MAGNESIUM FERROSILICON, CAUSING THE MOLTEN MAGNESIUM FERROSILICON TO SOLIDIFY IN THE CHILL IN CONTACT WITH SAID METAL MEMBER, REMOVING THE METAL MEMBER AFTER SOLIDIFICATION OF THE MAGNESIUM FERROSILICON AND REMOVING THE SOLIDIFIED MAGNESIUM FERROSILICON FROM THE CHILL.
Claim 2
Dependent Claim
87 words
A PROCESS FOR CASTING MAGNESIUM FERROSILICON WHICH COMPRISES PREPARING MOLTEN MAGNESIUM FERROSILICON, POURING THE MOLTEN MAGNESIUM FERROSILICON INTO A CHILL, PRO VIDING A METAL MEMBER IN CONTACT WITH THE UPPER SURFACE OF THE MOLTEN MAGNESIUM FERROSILICON IN THE CHILL, SAID METAL MEMBER SUBSTANTIALLY COVERING THE UPPER SURFACE OF THE MOLTEN MAGNESIUM FERROSILICON, CAUSING THE MOLTEN MAGNESIUM FERROSILICON TO SOLIDIFY IN THE CHILL IN CONTACT WITH SAID METAL MEMBER, REMOVING THE METAL MEMBER AFTER SOLIDIFICATION OF THE MAGNESIUM FERROSILICON AND REMOVING THE SOLIDIFIED MAGNESIUM FERROSILICON FROM THE CHILL.
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) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |