US2807374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple reeved level luffing single hoist line for cranes and derricks
Assignee: WILLIAM D CAROTHERS
•
Filing: 1953-09-22
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Granted: 1957-09-24
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Expires: 1973-09-22
Abstract
No abstract record available.
Inventors
- 👤 Leland O Mclean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:26
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/06; B66C23/08; B66C23/10; B66C13/00; B66C13/04; B66C13/06; B66C23/18; B66C23/36; B66C2700/00; B66C2700/03; B66C2700/0307; B66C2700/0321; B66C2700/0357; B66C2700/0364; B66C2700/0371
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1111102A
Cited
US1437685A
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US2355235A
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US2419209A
Cited
US2601611A
Cited
US2627984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |