Patent US4175022A successfully refreshed from Google Patents.
Patent US3233140A successfully refreshed from Google Patents.
US3233140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crossed-field dynamic electron multiplier
Assignee: University of Illinois at Urbana-Champaign
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Filing: 1961-07-25
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Granted: 1966-02-01
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Expires: 1981-07-25
Abstract
No abstract record available.
Inventors
- 👤 Don F Holshouser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:44
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
AN ELECTRONIC DEVICE COMPRISING A PAIR OF ELECTRODES POSITIONED SUBSTANTIALLY PARALLEL TO EACH OTHER, ONE ELECTRODE OF THE PAIR BEING ADAPTED TO RELEASE SECONDARY ELECTRONS IN A RATIO EXCEEDING UNITY UPON ELECTRON IMPACT, MEANS TO SUPPLY AN ALTERNATING HIGH FREQUENCY FIELD OF SELECTED AMPLITUDE BETWEEN THE ELECTRODES FOR PRODUCING AN ELECTRICAL FIELD WHICH IS SUBSTANTIALLY UNIFORM ALONG THE ELECTRODES IN THE DIRECTION OF ELECTRON TRAVEL, MEANS TO SUPPLY A MAGNETIC FIELD EFFECTIVE IN A DIRECTION PERPENDICULAR TO THE ALTERNATING HIGH FREQUENCY FIELD AND THE ELECTRON EMITTING ELECTRODE, MEANS TO SUPPLY A FLOW OF PRIMARY ELECTRONS BETWEEN THE ELECTRODES, AND MEANS TO COLLECT AN OUTPUT ELECTRON STREAM FOLLOWING THE RELEASE OF SECONDARY ELECTRONS FROM THE ACTIVE ELECTRODE.
Claim 2
Dependent Claim
116 words
AN ELECTRONIC DEVICE COMPRISING A PAIR OF ELECTRODES POSITIONED SUBSTANTIALLY PARALLEL TO EACH OTHER, ONE ELECTRODE OF THE PAIR BEING ADAPTED TO RELEASE SECONDARY ELECTRONS IN A RATIO EXCEEDING UNITY UPON ELECTRON IMPACT, MEANS TO SUPPLY AN ALTERNATING HIGH FREQUENCY FIELD OF SELECTED AMPLITUDE BETWEEN THE ELECTRODES FOR PRODUCING AN ELECTRICAL FIELD WHICH IS SUBSTANTIALLY UNIFORM ALONG THE ELECTRODES IN THE DIRECTION OF ELECTRON TRAVEL, MEANS TO SUPPLY A MAGNETIC FIELD EFFECTIVE IN A DIRECTION PERPENDICULAR TO THE ALTERNATING HIGH FREQUENCY FIELD AND THE ELECTRON EMITTING ELECTRODE, MEANS TO SUPPLY A FLOW OF PRIMARY ELECTRONS BETWEEN THE ELECTRODES, AND MEANS TO COLLECT AN OUTPUT ELECTRON STREAM FOLLOWING THE RELEASE OF SECONDARY ELECTRONS FROM THE ACTIVE ELECTRODE.
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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |