Patent US2505261A successfully refreshed from Google Patents.
US2505261A
Expired / Lapsed
US
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Beam type of electron discharge tubes
Assignee: Honeywell Inc
•
Filing: 1947-08-29
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Granted: 1950-04-25
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Expires: 1967-08-29
Abstract
No abstract record available.
Inventors
- 👤 Richard R Syrdal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:36
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1977398A
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US2011920A
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GB443364A
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US2093876A
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US2163233A
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US2184821A
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US2185807A
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US2302311A
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US2440889A
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US2436265A
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US2443916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |