Patent US2886738A successfully refreshed from Google Patents.
US2886738A
Expired / Lapsed
US
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Electron beam system
Assignee: AT&T Inc
•
Filing: 1954-01-29
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Granted: 1959-05-12
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Expires: 1974-01-29
Abstract
No abstract record available.
Inventors
- 👤 Ping K Tien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:43
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2615141A
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US2632130A
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US2643353A
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US2608668A
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US2812467A
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US2741718A
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US2809321A
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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) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |