US2834903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent lighting device
Assignee: General Electric Co
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Filing: 1952-10-30
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Granted: 1958-05-13
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Expires: 1972-10-30
Abstract
No abstract record available.
Inventors
- 👤 Roberts Shepard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:30
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/10; H05B33/12; H05B33/20; H05B33/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
AN ELECTROLUMINESCENT DEVICE COMPRISING A PAIR OF SUPERPOSED ELECTRICALLY CONDUCTIVE LAYERS, ONE OF SAID LAYERS BEING LIGHT-TRANSMITTING, AN ELECTROLUMINESCENT PHOSPHOR OF A LOW RESISTANCE TYPE DISPERSED IN A SOLID LIGHT TRANSMITING DIELECTRIC MATERIAL SANDWICHED BETWEEN SAID CONDUCTIVE LAYERS, AND A LIGHT TRANSMITTING INSULATING LAYER INTERPOSED BETWEEN SAID PHOSPHOR DIELECTRIC LAYER AND SAID LIGHT TRANSMITTING CONDUCTIVE LAYER, SAID DIELECTRIC MATERIAL AND THE MATERIAL COMPOSING SAID INSULATING LAYER EACH BEING SOLUBLE IN A SOLVENT IN WHICH THE OTHER IS NOT.
Claim 2
Dependent Claim
78 words
AN ELECTROLUMINESCENT DEVICE COMPRISING A PAIR OF SUPERPOSED ELECTRICALLY CONDUCTIVE LAYERS, ONE OF SAID LAYERS BEING LIGHT-TRANSMITTING, AN ELECTROLUMINESCENT PHOSPHOR OF A LOW RESISTANCE TYPE DISPERSED IN A SOLID LIGHT TRANSMITING DIELECTRIC MATERIAL SANDWICHED BETWEEN SAID CONDUCTIVE LAYERS, AND A LIGHT TRANSMITTING INSULATING LAYER INTERPOSED BETWEEN SAID PHOSPHOR DIELECTRIC LAYER AND SAID LIGHT TRANSMITTING CONDUCTIVE LAYER, SAID DIELECTRIC MATERIAL AND THE MATERIAL COMPOSING SAID INSULATING LAYER EACH BEING SOLUBLE IN A SOLVENT IN WHICH THE OTHER IS NOT.
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) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |