US2919753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter rotor head and rotor control
Assignee: Individual
•
Filing: 1956-11-26
•
Granted: 1960-01-05
•
Expires: 1976-11-26
Abstract
No abstract record available.
Inventors
- 👤 Hook Wesley Byron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:13
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/37; B64C27/45; B64C27/54; B64C27/58; B64C27/59; B64C27/625
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |