US2982495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft with tiltable lift engines
Assignee: Rolls Royce PLC
•
Filing: 1952-07-21
•
Granted: 1961-05-02
•
Expires: 1972-07-21
Abstract
No abstract record available.
Inventors
- 👤 Griffith Alan Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:46
CPC Classifications
B; B64; B64C; B64C23/00; B64C23/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR657557A
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US1891166A
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US2453721A
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GB568667A
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US2404954A
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US2588532A
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US2420323A
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FR903462A
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US2537487A
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GB610143A
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US2502045A
Cited
US2568021A
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US2589732A
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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) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |