US2740913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron gun
Assignee: TDK Micronas GmbH
•
Filing: 1951-11-01
•
Granted: 1956-04-03
•
Expires: 1971-11-01
Abstract
No abstract record available.
Inventors
- 👤 Charles P Majkrzak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:51
CPC Classifications
H; H01; H01J; H01J3/00; H01J3/02; H01J3/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2227051A
Cited
US2093876A
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US2170663A
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US2163740A
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US2184821A
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US2248558A
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US2279249A
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US2268165A
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US2244358A
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US2313018A
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US2282392A
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US2411913A
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US2436265A
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US2468136A
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US2521364A
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US2441315A
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US2462921A
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US2540621A
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US2569847A
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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) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |