US2809744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driving unit for bucket conveyors
Assignee: HANNAH JANE HAPMAN
•
Filing: 1953-07-10
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Granted: 1957-10-15
•
Expires: 1973-07-10
Abstract
No abstract record available.
Inventors
- 👤 Henry W Hapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:17
CPC Classifications
B; B65; B65G; B65G23/00; B65G23/02; B65G23/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US362571A
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US795166A
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US802047A
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US906858A
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US1279579A
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US2168852A
Cited
US2609086A
Cited
FR997091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |