US2986530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent vitreous enamel
Assignee: EIDP Inc
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Filing: 1959-07-16
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Granted: 1961-05-30
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Expires: 1979-07-16
Abstract
No abstract record available.
Inventors
- 👤 Lewis C Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:41
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145; C; C03; C03C; C03C4/00; C03C4/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
121 words
A NON-ACTIVATED ZINC SULFIDE-VITREOUS ENAMEL FRIT COMPOSITION CAPABLE OF ACTIVATION TO PRODUCE AN ELECTROLUMINESCENT GLASS COMPRISING A MIXTURE OF 50-90% BY WEIGHT OF FINELY DIVIDED NON-ACTIVATED ZINC SULFIDE OF THE ELECTROLUMINESCENT TYPE AND 10-50% BY WEIGHT OF FINELY DIVIDED VITREOUS ENAMEL FRIT HAVING A MATURING TEMPERATURE OF LESS THAN 700*C., AND CONTAINING AS ESSENTIAL INGREDIENTS IN PERCENTAGES BY WEIGHT, SIO2, 14.4 TO 29%, TIO2, 2.4 TO 31.9%, LI2O, 1.4 TO 8.2%, AND NA2O, 6.2 TO 25.4%, SAID FRIT CONTAINING LESS THAN 100 P.P.M. OF NI, MN, FE, CO OR PT AND LESS THAN 1% BY WEIGHT OF PBO, AND CONTAINING AN ACTIVATING AMOUNT OF A ZINC SULFIDE ACTIVATING AGENT TAKEN FROM THE GROUP CONSISTING OF SNO, CDO, CR2O3, CUO AND AS2O5.
References Cited (Backward Citations)
US2049765A
Cited
US2224516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |