US2935848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection system for ramjet aircraft
Assignee: Individual
•
Filing: 1955-02-09
•
Granted: 1960-05-10
•
Expires: 1975-02-09
Abstract
No abstract record available.
Inventors
- 👤 Louis S Billman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:55
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/28; F23D; F23D11/00; F23D11/24; F23D11/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2571583A
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US2625788A
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US2647796A
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US2630324A
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US2753686A
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US2701609A
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US2825398A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |