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Patent US3540119A successfully refreshed from Google Patents.
US3540119A
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Method for fabricating microwave tubes employing helical slow wave circuits
Assignee: Varian Medical Systems Inc
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Filing: 1968-02-19
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Granted: 1970-11-17
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Expires: 1988-02-19
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Manoly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:12
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/26; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49016; Y10T29/4981; Y10T29/49812; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3018541A
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US2869217A
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US3302268A
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US3300677A
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US3327371A
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US3293478A
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US3268986A
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US3345732A
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US3394453A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |