Patent US2681423A successfully refreshed from Google Patents.
US2681423A
Expired / Lapsed
US
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Light reflecting screen for cathode-ray tubes
Assignee: ELECTRONIQUE SOC GEN
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Filing: 1950-07-28
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Granted: 1954-06-15
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Expires: 1970-07-28
Abstract
No abstract record available.
Inventors
- 👤 Auphan Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:44
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/12; H04; H04N; H04N5/00; H04N5/74; H04N5/7416; H04N5/7425
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2025143A
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US2128631A
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US2238137A
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US2182451A
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US2281280A
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US2415226A
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US2471409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-14 | 1957-12-14 | 1958-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-14 | 1961-12-14 | 1962-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-14 | 1965-12-14 | 1966-06-15 | $7700.00 | Window Closed / Lapsed |