Patent US2558647A successfully refreshed from Google Patents.
US2558647A
Expired / Lapsed
US
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Storage electrode type cathode-ray tube
Assignee: Cinema Television Ltd
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Filing: 1948-11-05
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Granted: 1951-06-26
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Expires: 1968-11-05
Abstract
No abstract record available.
Inventors
- 👤 Freeman George Stanle Percival
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:44
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/43; H01J29/435
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2133123A
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US2157048A
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US2212249A
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US2213070A
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US2250721A
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US2214973A
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US2240186A
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US2324504A
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US2403239A
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US2460093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |