Patent US3147445A successfully refreshed from Google Patents.
US3147445A
Expired / Lapsed
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Quadrupole focusing means for charged particle containment
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1959-11-05
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Granted: 1964-09-01
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Expires: 1979-11-05
Abstract
No abstract record available.
Inventors
- 👤 Ralph F Wuerker
- 👤 Robert V Langmuir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:49
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/49; H01J25/78
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
AN ELECTRON BEAM TUBE COMPRISING: AN ELECTRON GUN FOR PROVIDING A BEAM OF ELECTRONS ALONG THE LONGITUDINAL AXIS OF THE TUBE; A QUADRUPOLE ALTERNATING ELECTRIC FIELD CONTAINMENT MEANS CENTERED AROUND THE AXIS FOR PROVIDING TWO DIMENSIONAL TRANSVERSE CONTAINMENT OF SAID BEAM; SAID CONTAINMENT MEANS BEING DIVIDED INTO AT LEAST TWO ELECTRICALLY DISTINCT SPACED APART LONGITUDINAL SECTIONS INCLUDING AN INPUT COUPLER AND AN OUTPUT COUPLER; ELECTRIC CIRCUIT MEANS FOR ENERGIZING EACH SECTION OF SAID ALTERNATING ELECTRIC FIELD CONTAINMENT MEANS TO PROVIDE ALTERNATE GRADIENT FOCUSING OF SAID BEAM, AND SECOND ELECTRIC CIRCUIT MEANS CONNECTED FOR IMPRESSING A TRANSVERSE DRIVING ALTERNATING ELECTRIC FIELD TO SAID INPUT SECTION TO IMPART TRANSVERSE OSCILLATIONS TO SAID BEAM.
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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |