US2800602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low noise electron discharge tubes
Assignee: Leland Stanford Junior University
•
Filing: 1951-06-05
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Granted: 1957-07-23
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Expires: 1971-06-05
Abstract
No abstract record available.
Inventors
- 👤 Lester M Field
- 👤 Dean A Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:59
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/06; H01J23/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2247338A
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US2276320A
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US2400753A
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US2422695A
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US2537862A
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FR934220A
Cited
US2636948A
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US2654047A
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US2584597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |