Patent US2968146A successfully refreshed from Google Patents.
US2968146A
Expired / Lapsed
US
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Convertible turbo-rocket and ram jet engine
Assignee: Power Jets Research and Development Ltd
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Filing: 1957-02-26
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Granted: 1961-01-17
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Expires: 1977-02-26
Abstract
No abstract record available.
Inventors
- 👤 Howell Alun Raymond
- 👤 Moss Charles Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:32
CPC Classifications
F; F02; F02K; F02K3/00; F02K3/02; F02K3/04; F02K3/062; F02K7/00; F02K7/10; F02K7/16; F02K7/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2407454A
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US2464724A
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GB599391A
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US2619797A
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FR1010604A
Cited
US2659196A
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US2754655A
Cited
US2716329A
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US2832192A
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US2762192A
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US2801789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |