US2637406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescopic rotor blades and brakes therefor
Assignee: Individual
•
Filing: 1948-01-09
•
Granted: 1953-05-05
•
Expires: 1968-01-09
Abstract
No abstract record available.
Inventors
- 👤 Isacco Vittorio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:30
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US266166A
Cited
US1344640A
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US1478063A
Cited
US1969077A
Cited
US2052781A
Cited
US2163482A
Cited
US2108245A
Cited
GB531241A
Cited
US2364496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |