US3025244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
White air-fired electroluminescent phosphor
Assignee: General Electric Co
•
Filing: 1959-12-02
•
Granted: 1962-03-13
•
Expires: 1979-12-02
Abstract
No abstract record available.
Inventors
- 👤 Aven Manuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:53
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
THE METHOD OF PREPARING A SINGLE COMPONENT ELECTROLUMINESCENT PHOSPHOR CHARACTERIZED BY WHITE EMISSION AT FREQUENCIES OF ABOUT 60 CYCLES PER SECOND AND CONSTANCY OF COLOR DURING LIFE WHICH COMPRISES PREFIRING AT A TEMPERATURE IN THE RANGE OF 1150 TO 1250*C. A MIXTURE OF ZNS AND 10 TO 40% ZNO BY WEIGHT AND INCLUDING A MANGANESE SALT IN A PROPORTION TO GIVE FROM 0.75 TO 1.25 ATOM PERCENT OF MANGANESE PER MOL OF ZINC SULFIDE, COOLING THE PREFIRED MATERIAL AND ADDING COPPER AND CHLORIDE SALTS TO PROVIDE 0.1 TO 1.0 ATOM PERCENT COPPER AND 1 TO 3 ATOM
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) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |