Patent US2534548A successfully refreshed from Google Patents.
US2534548A
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US
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High-power water-cooled electron discharge device
Assignee: AT&T Inc
•
Filing: 1948-12-30
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Granted: 1950-12-19
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Expires: 1968-12-30
Abstract
No abstract record available.
Inventors
- 👤 Clifford E Fay
- 👤 Douglas A S Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:27
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/32; H01J19/34; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US810431A
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US1124504A
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US2317442A
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US2399004A
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US2419124A
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US2434529A
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US2438899A
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US2449256A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |