US2887402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing electroluminescent lamps
Assignee: EIDP Inc
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Filing: 1958-05-29
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Granted: 1959-05-19
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Expires: 1978-05-29
Abstract
No abstract record available.
Inventors
- 👤 Kermit H Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:27
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/22; Y; Y10; Y10S; Y10S116/00; Y10S116/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE METHOD OF PRODUCING AN ELECTROLUMINESCENT LAMP WHICH COMPRISES FORMING THE FOLLOWING LAMINAR STRUCTURE OVER A LAYER OF PARTING MATERIAL ON A TEMPORARY SUPPORTING BASE; IN ORDER, A LAYER OF VITREOUS ENAMEL FRIT, A LAYER COMPRISING AN ELECTRICAL CONDUCTOR, A LAYER OF FINELY DIVIDED ELECTROLUMINESCENT PHOSPHOR, A LACQUER LAYER, A SECOND LAYER OF VITREOUS ENAMEL FRIT, AND A SECOND LAYER COMPRISING AN ELECTRICAL CONDUCTOR, AND FIRING SAID LAMINAR STRUCTURE AT THE MATURING TEMPERATURE OF SAID FRIT.
Claim 2
Independent Claim
76 words
THE METHOD OF PRODUCING AN ELECTROLUMINESCENT LAMP WHICH COMPRISES FORMING THE FOLLOWING LAMINAR STRUCTURE OVER A LAYER OF PARTING MATERIAL ON A TEMPORARY SUPPORTING BASE; IN ORDER, A LAYER OF VITREOUS ENAMEL FRIT, A LAYER COMPRISING AN ELECTRICAL CONDUCTOR, A LAYER OF FINELY DIVIDED ELECTROLUMINESCENT PHOSPHOR, A LACQUER LAYER, A SECOND LAYER OF VITREOUS ENAMEL FRIT, AND A SECOND LAYER COMPRISING AN ELECTRICAL CONDUCTOR, AND FIRING SAID LAMINAR STRUCTURE AT THE MATURING TEMPERATURE OF SAID FRIT.
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) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |