Patent US3345820A successfully refreshed from Google Patents.
US3345820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron bombardment ion engine
Assignee: Individual
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Filing: 1965-10-19
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Granted: 1967-10-10
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Expires: 1985-10-19
Abstract
No abstract record available.
Inventors
- 👤 Hugh L Dryden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:00
CPC Classifications
F; F03; F03H; F03H1/00; F03H1/0037; F03H1/0056; F03H1/0043; H; H01; H01J; H01J27/00; H01J27/02; H01J27/08; H01J27/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
AN ION ENGINE COMPRISING: A HOUSING HAVING AN OPEN END; ANODE MEANS CENTRALLY MOUNTED WITHIN SAID HOUSING AND EXTENDING TOWARD SAID OPEN END; CATHODE MEANS COAXIALLY MOUNTED IN SAID HOUSING ABOUT SAID ANODE MEANS TO DEFINE A CHAMBER THEREBETWEEN; MEANS FOR CONNECTING SAID ANODE MEANS AND CATHODE MEANS TO A POTENTIAL SOURCE FOR ESTABLISHING A RADIAL ELECTRICAL FIELD IN SAID CHAMBER WITH THE ANODE MEANS AT A POSITIVE POTENTIAL WITH RESPECT TO THE CATHODE MEANS, WHEREBY ELECTRONS FROM SAID CATHODE MEANS ARE ATTRACTED BY SAID ANODE MEANS; SOURCE MEANS FOR SUPPLYING A PROPELLANT GAS INTO SAID CHAMBER THROUGH SAID CATHODE MEANS, WHEREBY ATOMS OF SAID GAS ARE IONIXED BY ELECTRONS FROM SAID CATHODE MEANS, TO FORM IONS IN SAID CHAMBER; AND MEANS DISPOSED ADJACENT SAID OPEN END FOR ATTRACTING THE IONS PRODUCED IN SAID CHAMBER AND FOR FOCUSING SAID IONS INTO AN ION BEAM.
Claim 2
Dependent Claim
144 words
AN ION ENGINE COMPRISING: A HOUSING HAVING AN OPEN END; ANODE MEANS CENTRALLY MOUNTED WITHIN SAID HOUSING AND EXTENDING TOWARD SAID OPEN END; CATHODE MEANS COAXIALLY MOUNTED IN SAID HOUSING ABOUT SAID ANODE MEANS TO DEFINE A CHAMBER THEREBETWEEN; MEANS FOR CONNECTING SAID ANODE MEANS AND CATHODE MEANS TO A POTENTIAL SOURCE FOR ESTABLISHING A RADIAL ELECTRICAL FIELD IN SAID CHAMBER WITH THE ANODE MEANS AT A POSITIVE POTENTIAL WITH RESPECT TO THE CATHODE MEANS, WHEREBY ELECTRONS FROM SAID CATHODE MEANS ARE ATTRACTED BY SAID ANODE MEANS; SOURCE MEANS FOR SUPPLYING A PROPELLANT GAS INTO SAID CHAMBER THROUGH SAID CATHODE MEANS, WHEREBY ATOMS OF SAID GAS ARE IONIXED BY ELECTRONS FROM SAID CATHODE MEANS, TO FORM IONS IN SAID CHAMBER; AND MEANS DISPOSED ADJACENT SAID OPEN END FOR ATTRACTING THE IONS PRODUCED IN SAID CHAMBER AND FOR FOCUSING SAID IONS INTO AN ION BEAM.
References Cited (Backward Citations)
US2809314A
Cited
US3156090A
Cited
US3191092A
Cited
US3159967A
Cited
FR1366930A
Cited
US3262262A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |