Patent US3407002A successfully refreshed from Google Patents.
US3407002A
Expired / Lapsed
US
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Remote control of mining machines
Assignee: Coal Industry Patents Ltd
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Filing: 1967-01-06
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Granted: 1968-10-22
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Expires: 1987-01-06
Abstract
No abstract record available.
Inventors
- 👤 Brian G Pidgeon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:54
CPC Classifications
E; E21; E21F; E21F17/00; E21F17/18; E21C; E21C35/00; E21C35/24; G; G08; G08C; G08C17/00; G08C17/06; H; H04; H04B; H04B5/00; H04B5/20; H04B5/22; H04B5/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3206751A
Cited
US3293521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |