Patent US2862128A successfully refreshed from Google Patents.
US2862128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron guns
Assignee: AT&T Inc
•
Filing: 1953-12-30
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Granted: 1958-11-25
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Expires: 1973-12-30
Abstract
No abstract record available.
Inventors
- 👤 George H Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:33
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2201817A
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US1959500A
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US2131204A
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US2189358A
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US2590100A
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US2581243A
Cited
US2683238A
Cited
US2585582A
Cited
US2719936A
Cited
US2685046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |