Patent US2745248A successfully refreshed from Google Patents.
US2745248A
Expired / Lapsed
US
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Convertible pulse jet and ram jet engine
Assignee: McDonnell Aircraft Corp
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Filing: 1950-10-12
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Granted: 1956-05-15
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Expires: 1970-10-12
Abstract
No abstract record available.
Inventors
- 👤 John S Winter
- 👤 George W Kallal
- 👤 James J Mazzoni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:33
CPC Classifications
F; F02; F02K; F02K7/00; F02K7/10; F02K7/20; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1854615A
Cited
US2397357A
Cited
GB590177A
Cited
US2505757A
Cited
GB614696A
Cited
US2677232A
Cited
US2644396A
Cited
US2635421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |