US2856788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter control mechanism
Assignee: D K JOVANOVICH
•
Filing: 1953-10-26
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Granted: 1958-10-21
•
Expires: 1973-10-26
Abstract
No abstract record available.
Inventors
- 👤 Drago K Jovanovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:23
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/54; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012; Y10T74/20207; Y10T74/20213; Y10T74/20372; Y10T74/20384; Y10T74/2039
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2509313A
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US2441212A
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US2599690A
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US2445550A
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US2521806A
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US2629452A
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US2642143A
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FR1009222A
Cited
US2514212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |