Patent US2955227A successfully refreshed from Google Patents.
US2955227A
Expired / Lapsed
US
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Electron beam tube
Assignee: RCA Corp
•
Filing: 1957-02-18
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Granted: 1960-10-04
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Expires: 1977-02-18
Abstract
No abstract record available.
Inventors
- 👤 Leon S Nergaard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:50
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/36; H01J23/40; H01J23/48; H01J23/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23647E
Cited
US2615141A
Cited
FR1043066A
Cited
DE955975C
Cited
US2823333A
Cited
US2850704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |