Patent US2992723A successfully refreshed from Google Patents.
US2992723A
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US
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Extensible belt conveyor
Assignee: Consolidation Coal Co
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Filing: 1957-11-22
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Granted: 1961-07-18
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Expires: 1977-11-22
Abstract
No abstract record available.
Inventors
- 👤 William N Poundstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:34
CPC Classifications
B; B65; B65G; B65G21/00; B65G21/02; B65G21/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1659316A
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GB278972A
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US1817348A
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US2393563A
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US2678125A
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US2774462A
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US2808924A
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US2788116A
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US2842242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |