US2516474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric furnace for production of magnesium
Assignee: Alcan Research and Development Ltd
•
Filing: 1948-07-29
•
Granted: 1950-07-25
•
Expires: 1968-07-29
Abstract
No abstract record available.
Inventors
- 👤 Melsted Valdemar James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:49
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/20; C22B26/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US614930A
Cited
US614927A
Cited
US724705A
Cited
US920473A
Cited
US957058A
Cited
US1054380A
Cited
US1103060A
Cited
US1406851A
Cited
US1357901A
Cited
US1640735A
Cited
US1680630A
Cited
CH150853A
Cited
US2244267A
Cited
US2386189A
Cited
US2415494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |