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US2829299A
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Electron discharge devices
Assignee: International Standard Electric Corp
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Filing: 1950-08-01
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Granted: 1958-04-01
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Expires: 1970-08-01
Abstract
No abstract record available.
Inventors
- 👤 Beck Arnold Hugh William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:33
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/10; H01J25/12; H01J23/00; H01J23/02; H01J23/08; H01J23/087; H01J29/00; H01J29/46; H01J29/58; H01J3/00; H01J3/02; H01J3/029
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2225447A
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US2300052A
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US2305884A
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US2376707A
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US2591350A
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US2579654A
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US2516944A
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US2524252A
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US2608668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |