US3082344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improving electroluminescent phosphor and electroluminescent lamp
Assignee: Westinghouse Electric Corp
•
Filing: 1960-09-28
•
Granted: 1963-03-19
•
Expires: 1980-09-28
Abstract
No abstract record available.
Inventors
- 👤 Jr William A Thornton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:26
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE METHOD OF IMPROVING THE PERFORMANCE OBTAINABLE FROM FINELY DIVIDED ELECTROLUMINESCENT PHOSPHOR AT LEAST PRINCIPALLY COMPRISING ZINC SULFIDE AS MATRIX AND INCLUDING COPPER AS ACTIVATOR AND WHICH PHOSPHOR HAS BEEN RENDERED ELECTROLUMINESCENT BY FIRING THE PHOSPHOR RAWMIX CONSTITUENTS IN A SULPHURIZING ATMOSPHERE AT A TEMPERATURE OF FROM 800*C. TO 1100*C. FOR AT LEAST 10 MINUTES, WITH THE LONGER THE FIRING TEMPERATURE THE LONGER THE FIRING TIME, WHICH METHOD COMPRISES, BAKING THE PHOSPHOR AT A TEMPERATURE OF FROM 470*C. TO 1000*C. FOR A PERIOD OF AT LEAST ABOUT ONE HOUR IN AN ATMOSPHERE COMPRISING OXYGEN.
Claim 2
Independent Claim
94 words
THE METHOD OF IMPROVING THE PERFORMANCE OBTAINABLE FROM FINELY DIVIDED ELECTROLUMINESCENT PHOSPHOR AT LEAST PRINCIPALLY COMPRISING ZINC SULFIDE AS MATRIX AND INCLUDING COPPER AS ACTIVATOR AND WHICH PHOSPHOR HAS BEEN RENDERED ELECTROLUMINESCENT BY FIRING THE PHOSPHOR RAWMIX CONSTITUENTS IN A SULPHURIZING ATMOSPHERE AT A TEMPERATURE OF FROM 800*C. TO 1100*C. FOR AT LEAST 10 MINUTES, WITH THE LONGER THE FIRING TEMPERATURE THE LONGER THE FIRING TIME, WHICH METHOD COMPRISES, BAKING THE PHOSPHOR AT A TEMPERATURE OF FROM 470*C. TO 1000*C. FOR A PERIOD OF AT LEAST ABOUT ONE HOUR IN AN ATMOSPHERE COMPRISING OXYGEN.
References Cited (Backward Citations)
GB718804A
Cited
US2755255A
Cited
GB782095A
Cited
GB745860A
Cited
US2821509A
Cited
US2950257A
Cited
US2957830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |