US2824992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent lamp
Assignee: GTE Sylvania Inc
•
Filing: 1955-01-17
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Granted: 1958-02-25
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Expires: 1975-01-17
Abstract
No abstract record available.
Inventors
- 👤 George H Bouchard
- 👤 Joseph A Dombrowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:02
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/20; Y; Y10; Y10S; Y10S116/00; Y10S116/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
AN ELECTROLUMINESCENT LAMP COMPRISING AN ELECTRODE, A COATING OF PHOSPHOR AND DILECTRIC MATERIAL OVER SAID ELECTRODE, A SECOND COATING OF PHOSPHOR AND DIELECTRIC MATERIAL OVER SAID FRIST COATING, EACH OF SAID COATINGS VARYING IN COMPOSITION FROM A NEARLY CLEAR GLASS ON ONE SIDE OF THE COATING TO A NEARLY PURE LAYER OF PHOSOPOR ON THE OTHER.
Claim 2
Dependent Claim
56 words
AN ELECTROLUMINESCENT LAMP COMPRISING AN ELECTRODE, A COATING OF PHOSPHOR AND DILECTRIC MATERIAL OVER SAID ELECTRODE, A SECOND COATING OF PHOSPHOR AND DIELECTRIC MATERIAL OVER SAID FRIST COATING, EACH OF SAID COATINGS VARYING IN COMPOSITION FROM A NEARLY CLEAR GLASS ON ONE SIDE OF THE COATING TO A NEARLY PURE LAYER OF PHOSOPOR ON THE OTHER.
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) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |