US2792189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible aircraft with retractable lift rotor
Assignee: Individual
•
Filing: 1953-07-16
•
Granted: 1957-05-14
•
Expires: 1973-07-16
Abstract
No abstract record available.
Inventors
- 👤 Altemus James Dobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:29
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/22; B64C27/30; B64C29/00; B64C29/0091
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2008843A
Cited
US2330803A
Cited
US2464285A
Cited
US2498283A
Cited
US2650666A
Cited
US2531976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |