US2933887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound gas turbine engine with control for low-pressure rotor
Assignee: Rolls Royce PLC
•
Filing: 1954-07-02
•
Granted: 1960-04-26
•
Expires: 1974-07-02
Abstract
No abstract record available.
Inventors
- 👤 Davies David Omri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:37
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/06; F02K1/15; F02K1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2641324A
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US2668416A
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US2674843A
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US2778191A
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US2683349A
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US2617361A
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US2820340A
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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) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |