US2990138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft with turbine driven lifting fans
Assignee: Power Jets Research and Development Ltd
•
Filing: 1957-10-02
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Granted: 1961-06-27
•
Expires: 1977-10-02
Abstract
No abstract record available.
Inventors
- 👤 Shaw Ronald Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:05
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0016; B64C29/0025; B64C23/00; B64C23/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2505660A
Cited
US1034958A
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US1615938A
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US1868832A
Cited
US1892460A
Cited
US2308477A
Cited
US2692724A
Cited
US2568812A
Cited
US2589732A
Cited
FR1068404A
Cited
FR1107179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |