US2740254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound aircraft propelling ram jet and pulse jet engine
Assignee: McDonnell Aircraft Corp
•
Filing: 1947-11-26
•
Granted: 1956-04-03
•
Expires: 1967-11-26
Abstract
No abstract record available.
Inventors
- 👤 Alb C Ballauer
- 👤 Elbert R Sargent
- 👤 James H Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:42
CPC Classifications
F; F02; F02K; F02K7/00; F02K7/10; F02K7/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1369672A
Cited
FR844442A
Cited
US2396911A
Cited
US2486967A
Cited
US2573697A
Cited
US2525782A
Cited
US2574460A
Cited
US2496351A
Cited
US2482505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |