Patent US2973165A successfully refreshed from Google Patents.
US2973165A
Expired / Lapsed
US
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Aircraft with jet engines in wings
Assignee: Power Jets Research and Development Ltd
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Filing: 1958-01-22
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Granted: 1961-02-28
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Expires: 1978-01-22
Abstract
No abstract record available.
Inventors
- 👤 Davidson Ivor Macaulay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:15
CPC Classifications
B; B64; B64C; B64C23/00; B64C23/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1835370A
Cited
US1816130A
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US2178819A
Cited
FR55382E
Cited
US2372250A
Cited
US2466602A
Cited
US2604276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |