Patent US3401298A successfully refreshed from Google Patents.
US3401298A
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US
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Noise reduction in a travelling wave tube employing a helix input coupler
Assignee: The General Electric Company PLC
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Filing: 1965-07-28
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Granted: 1968-09-10
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Expires: 1985-07-28
Abstract
No abstract record available.
Inventors
- 👤 Dix Cyril Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:09
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10831; G01; G01N; G01N21/00; G01N21/17; G01N21/59; G01N21/5907; G01N21/5911; H; H01; H01J; H01J23/00; H01J23/02; H01J23/11; H01J23/16; H01J23/24; H01J23/30; H01J23/36; H01J23/40; H01J23/48; H01J23/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3258706A
Cited
GB696058A
Cited
US2672571A
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US2908844A
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US2767259A
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US3092750A
Cited
US3293482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |