US3375104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing magnesium ferrosilicon
Assignee: Elkem Metals Co LP
•
Filing: 1965-05-27
•
Granted: 1968-03-26
•
Expires: 1985-05-27
Abstract
No abstract record available.
Inventors
- 👤 Melvin L Mcclellan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:30
CPC Classifications
C; C21; C21C; C21C7/00; C21C1/00; C21C1/10; C21C1/105; C22; C22C; C22C1/00; C22C1/02; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3177071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |