US3398685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion drag pumps
Assignee: Northrop Grumman Guidance and Electronics Co Inc
•
Filing: 1961-09-11
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Granted: 1968-08-27
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Expires: 1981-09-11
Abstract
No abstract record available.
Inventors
- 👤 Otmar M Stuetzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:38
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/12; H01J41/18; Y; Y10; Y10S; Y10S55/00; Y10S55/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
APPARATUS FOR CONTINUOUSLY PUMPING AN INSULATING LIQUID COMPRISING AN ELONGATED TUBULAR SHAPED HOUSING, A SOLID COLD EMITTER ELECTRODE POSITIONED IN SAID HOUSING, A COLLECTOR ELECTRODE SPACED DOWNSTREAM FROM SAID EMITTER ELECTRODE A DISTANCE NO GREATER THAN THE LARGEST INTERNAL CROSS-SECTIONAL DIMENSION OF SAID HOUSING, FLOW CONSTRICTING MEANS IN SAID HOUSING FORMING A CONSTRICTED OPENING ADJACENT THE DOWNSTREAM END OF SAID EMITTER ELECTRODE, SAID MEANS DEFINING A FLOW PATH WHICH IS DIVERGENT FROM SAID CONSTRICTED OPENING IN THE DOWNSTREAM DIRECTION THEREFROM, AND MEANS CONNECTED BETWEEN SAID ELECTRODES TO ESTABLISH IONIZATION AND A HIGH FIELD STRENGTH IN THE LIQUID BETWEEN SAID ELECTRODES AND BETWEEN THE ENDS OF SAID DIVERGENT FLOW PATH.
Claim 2
Dependent Claim
109 words
APPARATUS FOR CONTINUOUSLY PUMPING AN INSULATING LIQUID COMPRISING AN ELONGATED TUBULAR SHAPED HOUSING, A SOLID COLD EMITTER ELECTRODE POSITIONED IN SAID HOUSING, A COLLECTOR ELECTRODE SPACED DOWNSTREAM FROM SAID EMITTER ELECTRODE A DISTANCE NO GREATER THAN THE LARGEST INTERNAL CROSS-SECTIONAL DIMENSION OF SAID HOUSING, FLOW CONSTRICTING MEANS IN SAID HOUSING FORMING A CONSTRICTED OPENING ADJACENT THE DOWNSTREAM END OF SAID EMITTER ELECTRODE, SAID MEANS DEFINING A FLOW PATH WHICH IS DIVERGENT FROM SAID CONSTRICTED OPENING IN THE DOWNSTREAM DIRECTION THEREFROM, AND MEANS CONNECTED BETWEEN SAID ELECTRODES TO ESTABLISH IONIZATION AND A HIGH FIELD STRENGTH IN THE LIQUID BETWEEN SAID ELECTRODES AND BETWEEN THE ENDS OF SAID DIVERGENT FLOW PATH.
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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) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |