US3142777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling wave tubes having helix derived slow-wave circuits with tapered support stubs and loading means
Assignee: Varian Medical Systems Inc
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Filing: 1963-07-15
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Granted: 1964-07-28
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Expires: 1983-07-15
Abstract
No abstract record available.
Inventors
- 👤 John W Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:33
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/26; H01J23/27
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
A SLOW WAVE CIRCUIT FOR HIGH FREQUENCY ELECTRON DISCHARGE DEVICES COMPRISING, A CONTRA-WOUND HELIX DERIVED SLOW-WAVE CIRCUIT POSITIONED ALONG AND DISPOSED ABOUT A PREDETERMINED LINE OF CIRCUIT DEVELOPMENT THEREBY DEFINING A CENTRAL AXIS, A PLURALITY OF SUPPORTING STUBS FIXEDLY ATTACHED TO SAID SLOW-WAVE CIRCUIT, SAID STUBS EACH HAVING THEIR CENTRAL LONGITUDINAL AXIS LYING IN A PLURALITY OF SPACED PARALLEL PLANES, SAID PLANES BEING DISPOSED NORMAL TO SAID CENTRAL AXIS, SAID STUBS HAVING DIFFERENT
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) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |