US2958141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter simulating system, in particular for studying hovering flight
Assignee: Individual
•
Filing: 1954-06-30
•
Granted: 1960-11-01
•
Expires: 1974-06-30
Abstract
No abstract record available.
Inventors
- 👤 Dorand Rene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:23
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2350351A
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US2336436A
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US2409938A
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US2352101A
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US2385095A
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US2474096A
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US2485499A
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US2687580A
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US2712184A
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US2701922A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |