US3023338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent lamp and method
Assignee: Westinghouse Electric Corp
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Filing: 1959-08-12
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Granted: 1962-02-27
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Expires: 1979-08-12
Abstract
No abstract record available.
Inventors
- 👤 Nicholas F Cerulli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:24
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
AN ELECTROLUMINESCENT LAMP COMPRISING, SPACED ELECTRODES, FINELY-DIVIDED ELECTROLUMINESCENT PHOSPHOR EMBEDDED IN GLASS INCLUDED BETWEEN SAID SPACED ELECTRODES, SAID PHOSPHOR COMPRISING ZINC SULFIDE AND INCLUDING COPPER AS ACTIVATOR, AND SAID PHOSPHOR HAVING BEEN EMBEDDED IN GLASS BY THE METHOD WHICH COMPRISES: PREPARING A MIX COMPRISING PHOSPHOR WHICH INCLUDES ZINC SULFIDE AS MATRIX AND COPPER AS ACTIVATOR AND FINELY-DIVIDED GLASS WHICH WHEN FIRED AT A TEMPERATURE CONSIDERABLY LOWER THAN THE TEMPERATURE REQUIRED TO CRYSTALLIZE THE MATRIX FOR ZINC SULFIDE ELECTROLUMINESCENT PHOSPHOR WILL DISPLAY SUBSTANTIALLY NO REACTION WITH ZINC SULFIDE AND
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) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |