Patent US3014154A successfully refreshed from Google Patents.
US3014154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion rocket engine
Assignee: Individual
•
Filing: 1959-10-01
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Granted: 1961-12-19
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Expires: 1979-10-01
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Ehlers
- 👤 Iii Ferdinand Voelker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:41
CPC Classifications
F; F03; F03H; F03H1/00; F03H1/0037; F03H1/0056; B; B64; B64G; B64G1/00; B64G1/22; B64G1/40; B64G1/411; B64G1/413; F03H1/0006; F03H1/0025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-18 | 1965-06-19 | 1965-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-18 | 1969-06-19 | 1969-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-18 | 1973-06-19 | 1973-12-19 | $7700.00 | Window Closed / Lapsed |