Patent US3054919A successfully refreshed from Google Patents.
US3054919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving electroluminescent phosphor and electroluminescent device
Assignee: Westinghouse Electric Corp
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Filing: 1959-12-24
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Granted: 1962-09-18
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Expires: 1979-12-24
Abstract
No abstract record available.
Inventors
- 👤 Lehmann Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:35
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
AN ELECTROLUMINESCENT DEVICE COMPRISING, SPACED ELECTRODES, MATERIAL BETWEEN SAID ELECTRODES COMPRISING ELECTROLUMINESCENT PHOSPHOR, SAID PHOSPHOR PRINCIPALLY COMPRISING ZINC SULFIDE AND INCLUDING COPPER AS ACTIVATOR AND HAVING BEEN ADDITIONALLY PROCESSED AFTER INITIAL PREPARATION AND UNTIL INCORPORATION INTO SAID DEVICE BY THE METHOD COMPRISING: SUBSTANTIALLY DRYING SAID PHOSPHOR; MIXING IN INTIMATE CONTACT WITH SAID PHOSPHOR A PREDETERMINED AMOUNT OF SUBSTANTIALLY-DRY, FINELY-DIVIDED, WHITE, CHEMICALLY-BASIC AND WATER-SORPTIVE MATERIAL HAVING AN ELECTRICAL CONDUCTIVITY, BOTH WITH AND WITHOUT COMBINED WATER, WHICH IS LESS THAN THE ELECTRICAL CONDUCTIVITY OF ZINC SULFIDE; AND MAINTAINING SAID PHOSPHOR AND MATERIAL MIXED THEREWITH UNDER SUBSTANTIALLY MOISTURE-FREE
Claim 2
Dependent Claim
95 words
AN ELECTROLUMINESCENT DEVICE COMPRISING, SPACED ELECTRODES, MATERIAL BETWEEN SAID ELECTRODES COMPRISING ELECTROLUMINESCENT PHOSPHOR, SAID PHOSPHOR PRINCIPALLY COMPRISING ZINC SULFIDE AND INCLUDING COPPER AS ACTIVATOR AND HAVING BEEN ADDITIONALLY PROCESSED AFTER INITIAL PREPARATION AND UNTIL INCORPORATION INTO SAID DEVICE BY THE METHOD COMPRISING: SUBSTANTIALLY DRYING SAID PHOSPHOR; MIXING IN INTIMATE CONTACT WITH SAID PHOSPHOR A PREDETERMINED AMOUNT OF SUBSTANTIALLY-DRY, FINELY-DIVIDED, WHITE, CHEMICALLY-BASIC AND WATER-SORPTIVE MATERIAL HAVING AN ELECTRICAL CONDUCTIVITY, BOTH WITH AND WITHOUT COMBINED WATER, WHICH IS LESS THAN THE ELECTRICAL CONDUCTIVITY OF ZINC SULFIDE; AND MAINTAINING SAID PHOSPHOR AND MATERIAL MIXED THEREWITH UNDER SUBSTANTIALLY MOISTURE-FREE
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) | 1965-09-17 | 1966-03-19 | 1966-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-17 | 1970-03-19 | 1970-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-17 | 1974-03-19 | 1974-09-18 | $7700.00 | Window Closed / Lapsed |