US2965784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent vitreous enamel and lamp
Assignee: EIDP Inc
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Filing: 1959-01-15
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Granted: 1960-12-20
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Expires: 1979-01-15
Abstract
No abstract record available.
Inventors
- 👤 Lewis C Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:13
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
124 words
AN ELECTROLUMINESCENT LAMP COMPRISING A METAL BASE TAKEN FROM THE GROUP CONSISTING OF ALUMINUM, ALUMINUM ALLOYS, AUSTENITIC STAINLESS STEEL, AND COPPER, A VITREOUS ENAMEL CONTAINING EMBEDDED THEREIN 65% TO 80% PHOSPHOR ON SAID BASE AND A LIGHT TRANSMITTING BASED PHOSPHOR ON SAID BASE AND A LIGHT TRANSMITTING ELECTRICALLY CONDUCTING LAYER ON SAID VITREOUS ENAMEL, SAID CITREOUS ENAMEL COMPRISING, IN A TOTAL AMOUNT OF AT LEAST 85 MOL PERCENT, MOL PERCENT MOL PERCENT SIO2--------17-33 SB2O3-------0-1 TIO2--------20-30 BAO----------0-10 NA2O--------24-29 CAO----------0-3 LI2O-------- 3-5 ZRO2---------0-2 K2O--------- 3-9 ZNO--------- 0-2 B2O3-------- 0-11 AND CONTAINING LESS THAN 100 P.P.M OF AN OXIDE OF THE GROUP CONSISTING OF NIO, FE2O3, MNO, COO AND PTO AND IN WHICH THE TOTAL R2O (NA2O, K2O AND LI2O) IS 35-38 MOL PERCENT AND THE RATIO
References Cited (Backward Citations)
US2689188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |