Patent US2423830A successfully refreshed from Google Patents.
US2423830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray screen having contrasting colors and unlike rates of decay of luminescence
Assignee: General Electric Co
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Filing: 1943-03-25
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Granted: 1947-07-15
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Expires: 1963-03-25
Abstract
No abstract record available.
Inventors
- 👤 Gorton R Fonda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:24
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB424195A
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DE640056C
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US2243828A
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US2277009A
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US2233786A
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US2303563A
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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) | 1950-07-14 | 1951-01-13 | 1951-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-14 | 1955-01-13 | 1955-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-14 | 1959-01-13 | 1959-07-15 | $7700.00 | Window Closed / Lapsed |