US2912820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined ram jet and rocket engine
Assignee: Individual
•
Filing: 1953-07-31
•
Granted: 1959-11-17
•
Expires: 1973-07-31
Abstract
No abstract record available.
Inventors
- 👤 Quentin R Whitmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:11
CPC Classifications
F; F02; F02K; F02K7/00; F02K7/10; F02K7/18; Y; Y10; Y10S; Y10S60/00; Y10S60/909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE596300C
Cited
DE598235C
Cited
US2206057A
Cited
GB590177A
Cited
US2724237A
Cited
US2603949A
Cited
GB669014A
Cited
US2711630A
Cited
US2799987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |