Patent US3475639A successfully refreshed from Google Patents.
US3475639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tricolor cathode ray tube having porous graphite layer on aluminum screen coating
Assignee: Compagnie Francaise de Television SA
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Filing: 1967-11-27
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Granted: 1969-10-28
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Expires: 1987-11-27
Abstract
No abstract record available.
Inventors
- 👤 Jean Pierre Driffort
- 👤 Pierre Lebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:13
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/30; H01J29/32; H01J29/185; H01J29/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |