US2716460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blade and control mechanism for helicopters
Assignee: Individual
•
Filing: 1952-02-28
•
Granted: 1955-08-30
•
Expires: 1972-02-28
Abstract
No abstract record available.
Inventors
- 👤 Raymond A Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:01
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/46; B64C27/54; B64C27/58; B64C27/59; B64C27/615; B64C27/72; B64C2027/7205; B64C2027/7261; B64C2027/7266; Y; Y02; Y02T; Y02T50/00; Y02T50/30
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) | 1958-08-29 | 1959-02-28 | 1959-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-29 | 1963-02-28 | 1963-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-29 | 1967-02-28 | 1967-08-30 | $7700.00 | Window Closed / Lapsed |