US2994800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-power, high-frequency amplifier klystron tube
Assignee: Varian Medical Systems Inc
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Filing: 1960-02-29
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Granted: 1961-08-01
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Expires: 1980-02-29
Abstract
No abstract record available.
Inventors
- 👤 Richard F Lazzarini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:59
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/36; D; D06; D06P; D06P3/00; D06P3/82; D06P3/8204; D06P3/8223
Claims Analysis
Total Claims: 0
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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) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |