US3133027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for processing zinc-cadmium sulfide electroluminescent phosphor
Assignee: Westinghouse Electric Corp
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Filing: 1962-01-15
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Granted: 1964-05-12
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Expires: 1982-01-15
Abstract
No abstract record available.
Inventors
- 👤 Lehmann Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:03
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 ENHANCING THE ELECTROLUMINESCENCE OF PHOSPHOR HAVING A CHARGE-COMPENSATED, COPPER-ACTIVATED MATRIX OF SUBSTANTIALLY HEXAGONAL CRYSTALLINE STRUCTURE AND SELECTED FROM A SULFIDE OF THE GROUP CONSISTING OF CADMIUM SULFIDE AND ZINC-CADMIUM SULFIDE, AND WITH THE RELATIVE MOLAR PROPORTIONS OF CDS/ZNS IN SAID PHOSPHOR BEING AT LEAST ABOUT 8/92, WHICH METHOD COMPRISES, BAKING SAID PHOSPHOR IN AN ATMOSPHERE CONSISTING ESSENTIALLY OF IODINE VAPOR AT A TEMPERATURE OF FROM 500*C. TO 900*C. FOR A PERIOD OF AT LEAST FIVE MINUTES, WITH THE LFOWER THE BAKING TEMPERATURE WITHIN THE FOREGOING RANGE, THE LONGER THE BAKING TIME.
Claim 2
Independent Claim
94 words
THE METHOD OF ENHANCING THE ELECTROLUMINESCENCE OF PHOSPHOR HAVING A CHARGE-COMPENSATED, COPPER-ACTIVATED MATRIX OF SUBSTANTIALLY HEXAGONAL CRYSTALLINE STRUCTURE AND SELECTED FROM A SULFIDE OF THE GROUP CONSISTING OF CADMIUM SULFIDE AND ZINC-CADMIUM SULFIDE, AND WITH THE RELATIVE MOLAR PROPORTIONS OF CDS/ZNS IN SAID PHOSPHOR BEING AT LEAST ABOUT 8/92, WHICH METHOD COMPRISES, BAKING SAID PHOSPHOR IN AN ATMOSPHERE CONSISTING ESSENTIALLY OF IODINE VAPOR AT A TEMPERATURE OF FROM 500*C. TO 900*C. FOR A PERIOD OF AT LEAST FIVE MINUTES, WITH THE LFOWER THE BAKING TEMPERATURE WITHIN THE FOREGOING RANGE, THE LONGER THE BAKING TIME.
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) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |