US2929580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft for vertical or short takeoff, and integrated propulsion lifting and propeller slip stream deflecting unit therefor
Assignee: Piasecki Aircraft Corp
•
Filing: 1956-06-18
•
Granted: 1960-03-22
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Expires: 1976-06-18
Abstract
No abstract record available.
Inventors
- 👤 Zbyslaw M Ciolkosz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:10
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0016; B64C29/0025; B64C39/00; B64C39/06; B64C39/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR558943A
Cited
US1824250A
Cited
US1800794A
Cited
FR727432A
Cited
US2118052A
Cited
FR989177A
Cited
US2468559A
Cited
US2610005A
Cited
US2780424A
Cited
FR1050948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |