US2689616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter rotor control mechanism
Assignee: NAGLER HELICOPTER Co Inc
•
Filing: 1952-02-18
•
Granted: 1954-09-21
•
Expires: 1972-02-18
Abstract
No abstract record available.
Inventors
- 👤 Nagler Bruno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:27
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/54; B64C27/58; B64C27/59; B64C27/605; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2151
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22595E
Cited
US1909845A
Cited
US2256635A
Cited
US2439089A
Cited
US2529479A
Cited
FR949061A
Cited
GB652817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |