US2866117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent panel
Assignee: British Thomson Houston Co Ltd
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Filing: 1956-04-11
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Granted: 1958-12-23
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Expires: 1976-04-11
Abstract
No abstract record available.
Inventors
- 👤 Walker Cyril Hubert
- 👤 Clarke Maurice George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:53
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
AN ELECTROLUMINESCENT DEVICE COMPRISING A SELFSUPPORTING WAFER OF DIELECTRIC MATERIAL OF A REFRACTORY NATURE SELECTED FROM THE GROUP CONSISTING OF TITANIUM DIOXIDE AND BARIUM TITANATE, AN ELECTROLUMINESCENT LAYER COMPOSED OF AN INTIMATE FUSION OF POWDERED ELECTOLUMINESCENT MATERIAL AND POWDERED GLASS SUPPORTED ON ONE FACE OF SAID WAFER, AN ELECTRICALLY CONDUCTIVE LAYER ON
Claim 2
Dependent Claim
52 words
AN ELECTROLUMINESCENT DEVICE COMPRISING A SELFSUPPORTING WAFER OF DIELECTRIC MATERIAL OF A REFRACTORY NATURE SELECTED FROM THE GROUP CONSISTING OF TITANIUM DIOXIDE AND BARIUM TITANATE, AN ELECTROLUMINESCENT LAYER COMPOSED OF AN INTIMATE FUSION OF POWDERED ELECTOLUMINESCENT MATERIAL AND POWDERED GLASS SUPPORTED ON ONE FACE OF SAID WAFER, AN ELECTRICALLY CONDUCTIVE LAYER ON
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) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |