US2948112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined rocket and ram-jet engine
Assignee: Individual
•
Filing: 1953-12-14
•
Granted: 1960-08-09
•
Expires: 1973-12-14
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:25
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/80; F02K7/00; F02K7/10; F02K7/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB590177A
Cited
US2446266A
Cited
US2609660A
Cited
US2677232A
Cited
GB669008A
Cited
US2658331A
Cited
US2638738A
Cited
US2716329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |