Patent US3121822A successfully refreshed from Google Patents.
US3121822A
Expired / Lapsed
US
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Circuits for unimoding crossed field devices
Assignee: General Electric Co
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Filing: 1960-10-28
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Granted: 1964-02-18
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Expires: 1980-10-28
Abstract
No abstract record available.
Inventors
- 👤 Malcolm R Boyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:27
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/18; H01J23/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
A MAGNETRON APPARATUS FOR PRODUCING HIGH FREQUENCY ELECTROMAGNETIC OSCILLATIONS COMPRISING A PLURALITY OF SYMMETRICALLY POSITIONED CONVERGENT, CONDUCTIVE VANES, A CATHODE EQUIDISTANTLY SPACED FROM EACH OF SAID VANES AND MEANS ESTABLISHING A MAGNETIC FIELD WITHIN THE REGION OF SAID VANES AND CATHODE AND BEING PERPENDICULAR TO A LINE BETWEEN SAID CATHODE AND ANY ONE OF SAID VANES, MEANS APPLYING A POTENTIAL TO SAID VANES POSITIVE WITH
References Cited (Backward Citations)
US2984764A
Cited
US2721295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |