US3397339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Band edge oscillation suppression techniques for high frequency electron discharge devices incorporating slow wave circuits
Assignee: Varian Medical Systems Inc
•
Filing: 1965-04-30
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Granted: 1968-08-13
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Expires: 1985-04-30
Abstract
No abstract record available.
Inventors
- 👤 William L Beaver
- 👤 Thomas R Mullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:49
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/30; H01J23/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2771565A
Cited
US2802135A
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US2820171A
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US2822501A
Cited
US3200286A
Cited
US3221204A
Cited
US3181024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |