US2995893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound ramjet-turborocket engine
Assignee: Napier Turbochargers Ltd
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Filing: 1958-06-13
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Granted: 1961-08-15
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Expires: 1978-06-13
Abstract
No abstract record available.
Inventors
- 👤 Ronald E Morris
- 👤 Upton George Frank
- 👤 Alan L Davies
- 👤 Alan L R Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:19
CPC Classifications
F; F02; F02K; F02K3/00; F02K3/02; F02K3/04; F02K3/075; F02K7/00; F02K7/10; F02K7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |