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US2479449A
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US
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Automatic dump skip
Assignee: Anaconda Copper Mining Co
•
Filing: 1944-10-10
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Granted: 1949-08-16
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Expires: 1964-10-10
Abstract
No abstract record available.
Inventors
- 👤 Clifford D Woodward
- 👤 Francis E Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:02
CPC Classifications
B; B66; B66B; B66B17/00; B66B17/08; B66B17/14; B66B17/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US221793A
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US528085A
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US763182A
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US1259035A
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US1335080A
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US1872054A
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US2187657A
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US2180797A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-15 | 1953-02-14 | 1953-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-15 | 1957-02-14 | 1957-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-15 | 1961-02-14 | 1961-08-16 | $7700.00 | Window Closed / Lapsed |