US2687779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined propulsion and rotary wing sustentation unit for aircraft
Assignee: Individual
•
Filing: 1949-01-31
•
Granted: 1954-08-31
•
Expires: 1969-01-31
Abstract
No abstract record available.
Inventors
- 👤 Adolphe C Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:57
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/22; B64C27/30; B64C29/00; B64C29/0008; B64C29/0016; B64C29/0025; B64C29/0091
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2518498A
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US2587649A
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US2526941A
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US2507657A
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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) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |