US2847386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent materials
Assignee: RCA Corp
•
Filing: 1953-11-27
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Granted: 1958-08-12
•
Expires: 1973-11-27
Abstract
No abstract record available.
Inventors
- 👤 Robert M Mazo
- 👤 Larach Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:53
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A METHOD FOR PRODUCING AN ELECTROLUMINESCENT MATERIAL WHICH COMPRISES HEATING TOGETHER IN A BROMINE CONTAINING ATMOSPHERE AT TEMPERATURES OF ABOUT 1000* C. TO 1200*C. A MIXTURE COMPRISING ABOUT 50 TO 70 MOLE PERCENT OF ZINC SULPHINE, ABOUT 50 TO 30 MOLE PERCENT OF ZINC SELENIDE, AND ABOUT 0.08% TO 0.2% BY WEIGHT OF COPPER ACTIVATOR.
Claim 2
Independent Claim
55 words
A METHOD FOR PRODUCING AN ELECTROLUMINESCENT MATERIAL WHICH COMPRISES HEATING TOGETHER IN A BROMINE CONTAINING ATMOSPHERE AT TEMPERATURES OF ABOUT 1000* C. TO 1200*C. A MIXTURE COMPRISING ABOUT 50 TO 70 MOLE PERCENT OF ZINC SULPHINE, ABOUT 50 TO 30 MOLE PERCENT OF ZINC SELENIDE, AND ABOUT 0.08% TO 0.2% BY WEIGHT OF COPPER ACTIVATOR.
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) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |