Patent US2650666A successfully refreshed from Google Patents.
US2650666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary-wing aircraft with jet-driven rotor
Assignee: Individual
•
Filing: 1947-07-16
•
Granted: 1953-09-01
•
Expires: 1967-07-16
Abstract
No abstract record available.
Inventors
- 👤 Dorand Rene
- 👤 Gabriet Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:37
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04; B64C27/12; B64C27/16; B64C27/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US506059A
Cited
FR522163A
Cited
GB227151A
Cited
GB366450A
Cited
US1971734A
Cited
US2085761A
Cited
US1982969A
Cited
US2164721A
Cited
US2041796A
Cited
US2084464A
Cited
US2092077A
Cited
US2280835A
Cited
US2330056A
Cited
US2396911A
Cited
US2356557A
Cited
US2421518A
Cited
US2411227A
Cited
US2397357A
Cited
US2409177A
Cited
GB556866A
Cited
US2429646A
Cited
US2443717A
Cited
US2441488A
Cited
US2433251A
Cited
US2464651A
Cited
US2457936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |