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US2956691A
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Hydraulic crane
Assignee: WILLIAM R CURTIS
•
Filing: 1959-06-08
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Granted: 1960-10-18
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Expires: 1979-06-08
Abstract
No abstract record available.
Inventors
- 👤 Donald J Fangman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:25
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/54; B60P1/5404; B60P1/5423; B60P1/5433
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2397271A
Cited
US2517813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |