US2419209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable transmission level luffing device for derricks and jib cranes
Assignee: Individual
•
Filing: 1944-08-11
•
Granted: 1947-04-22
•
Expires: 1964-08-11
Abstract
No abstract record available.
Inventors
- 👤 Goodman Robert
- 👤 Henry J Jacoby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:33
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/06; B66C23/08; B66C23/10; B66C2700/00; B66C2700/03; B66C2700/0307
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US523705A
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US1434076A
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GB191415650A
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GB225033A
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GB245477A
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GB289083A
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US1769750A
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US1908028A
Cited
US2323088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-21 | 1950-10-21 | 1951-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-21 | 1954-10-21 | 1955-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-21 | 1958-10-21 | 1959-04-22 | $7700.00 | Window Closed / Lapsed |