US2654844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrahigh-frequency generator and electron tube
Assignee: Varian Medical Systems Inc
•
Filing: 1951-06-19
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Granted: 1953-10-06
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Expires: 1971-06-19
Abstract
No abstract record available.
Inventors
- 👤 William W Eitel
- 👤 Jack A Mccullough
- 👤 Harold E Sorg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:00
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/78; H01J19/80
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) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |