Patent US3119043A successfully refreshed from Google Patents.
US3119043A
Expired / Lapsed
US
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Electron discharge device
Assignee: RCA Corp
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Filing: 1961-05-31
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Granted: 1964-01-21
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Expires: 1981-05-31
Abstract
No abstract record available.
Inventors
- 👤 Kenneth N Karol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:25
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
A TRAVELING WAVE TUBE COMPRISING AN ELONGATED DIELECTRIC ENVELOPE PORTION MADE UP OF TWO SIMILAR HOLLOW SUBSTANTIALLY SEMI-CYLINDRICAL DIELECTRIC SECTIONS HAVING SUBSTANTIALLY THE SAME RADIUS SEALED TOGETHER ALONG THEIR SIDE EDGES, ONE OF SAID SECTIONS HAVING TWO LONGITUDINAL RIDGES ON THE INNER SURFACE THEREOF SPACED APART CIRCUMFERENTIALLY BY AN ANGLE OF ABOUT 120*, AND AN ELONGATED METALLIC HELIX POSITIONED WITHIN SAID ENVELOPE PORTION WITH THE TURNS THEREOF FIXED TO SAID RIDGES AND SPACED FROM THE OTHER OF SAID SECTIONS.
References Cited (Backward Citations)
US2481906A
Cited
US2767344A
Cited
US2706366A
Cited
US2806170A
Cited
US2845690A
Cited
US2869217A
Cited
US3010048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-20 | 1967-07-22 | 1968-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-20 | 1971-07-22 | 1972-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-20 | 1975-07-22 | 1976-01-21 | $7700.00 | Window Closed / Lapsed |