US3374631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination subsonic and supersonic propulsion system and apparatus
Assignee: McDonnell Aircraft Corp
•
Filing: 1965-08-16
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Granted: 1968-03-26
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Expires: 1985-08-16
Abstract
No abstract record available.
Inventors
- 👤 Marvin D Marks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:54
CPC Classifications
F; F02; F02K; F02K7/00; F02K7/10; F02K7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3046732A
Cited
FR1187763A
Cited
US2955414A
Cited
US3001691A
Cited
US3176462A
Cited
US3091082A
Cited
US3192712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |