Patent US3304718A successfully refreshed from Google Patents.
US3304718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double optic system for ion engine
Assignee: Individual
•
Filing: 1965-08-04
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Granted: 1967-02-21
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Expires: 1985-08-04
Abstract
No abstract record available.
Inventors
- 👤 James E Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:29
CPC Classifications
F; F03; F03H; F03H1/00; F03H1/0037; F03H1/0043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN AN ION ENGINE, THE COMBINATION COMPRISING: A SOURCE OF IONIZABLE PROPELLANT, AN IONIZING MEANS FOR RECEIVING SAID PROPELLANT AND PRODUCING A STREAM OF IONS, A FOCUS ELECTRODE DOWNSTREAM OF SAID IONIZING MEANS AND AN ACCELERATOR ELECTRODE DOWNSTREAM OF SAID FOCUS ELECTRODE, SAID ACCELERATOR ELECTRODE HAVING A MAIN APERTURE FOR RECEIVING SAID ION STREAM AND A SECONDARY APERTURE FOR RECEIVING SPURIOUS IONS ORIGINATING FROM SAID FOCUS ELECTRODE.
Claim 2
Dependent Claim
67 words
IN AN ION ENGINE, THE COMBINATION COMPRISING: A SOURCE OF IONIZABLE PROPELLANT, AN IONIZING MEANS FOR RECEIVING SAID PROPELLANT AND PRODUCING A STREAM OF IONS, A FOCUS ELECTRODE DOWNSTREAM OF SAID IONIZING MEANS AND AN ACCELERATOR ELECTRODE DOWNSTREAM OF SAID FOCUS ELECTRODE, SAID ACCELERATOR ELECTRODE HAVING A MAIN APERTURE FOR RECEIVING SAID ION STREAM AND A SECONDARY APERTURE FOR RECEIVING SPURIOUS IONS ORIGINATING FROM SAID FOCUS ELECTRODE.
References Cited (Backward Citations)
US2798185A
Cited
US3114517A
Cited
US3014154A
Cited
US3117416A
Cited
US3052088A
Cited
US3159967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |