Patent US2656676A successfully refreshed from Google Patents.
US2656676A
Expired / Lapsed
US
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Ram jet engine
Assignee: McDonnell Aircraft Corp
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Filing: 1949-02-19
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Granted: 1953-10-27
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Expires: 1969-02-19
Abstract
No abstract record available.
Inventors
- 👤 George W Kallal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:15
CPC Classifications
F; F02; F02K; F02K7/00; F02K7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2385833A
Cited
FR920387A
Cited
US2566373A
Cited
US2566319A
Cited
US2482505A
Cited
US2520967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |