US2717043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contractable jet-driven helicopter rotor
Assignee: Individual
•
Filing: 1952-05-16
•
Granted: 1955-09-06
•
Expires: 1972-05-16
Abstract
No abstract record available.
Inventors
- 👤 Isacco Vittorio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:07
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04; B64C27/12; B64C27/16; B64C27/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR427951A
Cited
US1819863A
Cited
US1897092A
Cited
US1840152A
Cited
US2108245A
Cited
US2192881A
Cited
DE673964C
Cited
FR865452A
Cited
US2640549A
Cited
US2461347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-05 | 1959-03-07 | 1959-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-05 | 1963-03-07 | 1963-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-05 | 1967-03-07 | 1967-09-06 | $7700.00 | Window Closed / Lapsed |