US2813746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical apparatus for lifting
Assignee: Clarke Built Ltd
•
Filing: 1954-02-15
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Granted: 1957-11-19
•
Expires: 1974-02-15
Abstract
No abstract record available.
Inventors
- 👤 Goldsmith Thomas Leslie
- 👤 Clarke Frank Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:08
CPC Classifications
B; B65; B65B; B65B21/00; B65B21/02; B65B21/14; B65B21/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2454178A
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US2407529A
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US2417774A
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US2457027A
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US2443886A
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US2448204A
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US2592017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |