Patent US2792204A successfully refreshed from Google Patents.
US2792204A
Expired / Lapsed
US
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Mining apparatus with rotary cutting and dislodging drum
Assignee: Goodman Manufacturing Co LP
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Filing: 1954-10-25
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Granted: 1957-05-14
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Expires: 1974-10-25
Abstract
No abstract record available.
Inventors
- 👤 Cartlidge Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:43
CPC Classifications
E; E21; E21C; E21C31/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1431857A
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US1903673A
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US1866789A
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US2269781A
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US2418573A
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US2630902A
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US2737284A
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US2691513A
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US2695700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |