US2720754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flameholder for ram jet engine
Assignee: McDonnell Aircraft Corp
•
Filing: 1950-09-29
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Granted: 1955-10-18
•
Expires: 1970-09-29
Abstract
No abstract record available.
Inventors
- 👤 Francois Guy Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:52
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/16; F23R3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2404335A
Cited
GB593022A
Cited
US2385833A
Cited
US2529506A
Cited
US2547936A
Cited
US2520388A
Cited
US2632994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |