US3128432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclotron-wave parametric amplifiermixer tube
Assignee: AT&T Inc
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Filing: 1961-12-05
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Granted: 1964-04-07
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Expires: 1981-12-05
Abstract
No abstract record available.
Inventors
- 👤 Eugene I Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:57
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/49
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
A MIXER TUBE COMPRISING: MEANS INCLUDING A CATHODE FOR FORMING AND PROJECTING A BEAM OF ELECTRONS; MEANS FOR PRODUCING A LONGITUDINAL MAGNETIC FOCUSING FIELD ALONG THE BEAM; MEANS FOR CAUSING SIGNAL FREQUENCY ENERGY TO PROPAGATE ALONG THE BEAM AS A CYCLOTRON WAVE; MEANS FOR CAUSING LOCAL OSCILLATOR FREQUENCY ENERGY TO PROPAGATE ALONG THE BEAM AS A CYCLOTRON WAVE; MEANS FOR CONVERTING THE SIGNAL FREQUENCY AND LOCAL OSCILLATOR FREQUENCY CYCLOTRON WAVES TO SYNCHRONOUS WAVES;
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) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |