Patent US2812466A successfully refreshed from Google Patents.
US2812466A
Expired / Lapsed
US
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Ceramic electron tube
Assignee: Varian Medical Systems Inc
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Filing: 1953-06-08
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Granted: 1957-11-05
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Expires: 1973-06-08
Abstract
No abstract record available.
Inventors
- 👤 Clayton E Murdock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:15
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/20; H01J5/22; H01J5/26; H01J2893/00; H01J2893/0033; H01J2893/0037; H01J2893/0041
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2212556A
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US2173906A
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US2178826A
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US2431226A
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US2423066A
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US2412836A
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US2650683A
Cited
US2644907A
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US2723044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |