US2874308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent device
Assignee: GTE Sylvania Inc
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Filing: 1956-07-02
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Granted: 1959-02-17
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Expires: 1976-07-02
Abstract
No abstract record available.
Inventors
- 👤 Donald C Livingston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:56
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/12; H05; H05B; H05B33/00; H05B33/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
83 words
IN COMBINATION, AN ELECTROLUMINESCENT LAYER; A TRANSPARENT ELECTRICALLY CONDUCTIVE FILM COVERING ONE SURFACE OF SAID LAYER; A TRANSPARENT ELECTRICALLY INSULATING FILM COVERING A MAJOR PORTION OF THE CONDUCTING FILM AND LEAVING A MINOR PORTION OF SAID CONDUCTIVE FILM EXPOSED A PHOTOCONDUCTIVE FILM COVERING SAID INSULATIG FILM AND BEING IN CONNECTION TO A MINOR PORTION OF SAID PHOTOELECTRICAL CONNECTION TO A MUNOR PORTION OF SAID PHOTOCONCONDUCTIVE FILM, SAID-MINOR PORTION OF SAID PHOTOCONDUCTIVE FILM BEING REMOTE FROM THE MINOR PORTION OF SAID TRANSPARENT CONDUCTIVE FILM.
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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |