US3225253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent photoconductive display device
Assignee: International Business Machines Corp
•
Filing: 1961-12-28
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Granted: 1965-12-21
•
Expires: 1981-12-28
Abstract
No abstract record available.
Inventors
- 👤 Narken Bernt
- 👤 Allan S Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:13
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
AN ELECTROLUMINESCENT DISPLAY SCREEN CAPABLE OF PRODUCING LIGHT IMAGES INRESPONSE TO ELECTRIAL SIGNALS COMPRISING: A PHOTOCONDUCTIVE LAYER; AN ELECTROLUMINESCENT LAYER MOUNTED ADJACENT TO SAID PHOTOTCONDUCTIVE LAYER; AND MEANS FOR ESTABLISHING ELECTRODES ACROSS THE SAID ELECTROLUMINESCENT LAYER IN EACH OF TWO DIRECTIONS WHICH ARE AT RIGHT ANGLES TO ONE ANOTHER; SAID MEANS FOR ESTABLISHING ELECTRODES INCLUDING A MEANS FOR IRRADIATING THE PHOTOCONDUCTIVE LAYER WITH A SCANNING NARROW WIDTH STRIP OF LIGHT WHICH STRETECHES IN LENGTH SUBSTANTIALLY FROM ONE END OF THE SAID PHOTOCONDUCTIVE LAYER TO THE OTHER END OF SAID PHOTOCONDUCTIVE LAYER WHEREBY AN ELECTRODE OF THE WIDTH AND LENGTH OF THE STRIP OF LIGHT CONTINUOUSLYMOVES OVER THE ELECTROLUMINESCENT LAYER.
Claim 2
Dependent Claim
109 words
AN ELECTROLUMINESCENT DISPLAY SCREEN CAPABLE OF PRODUCING LIGHT IMAGES INRESPONSE TO ELECTRIAL SIGNALS COMPRISING: A PHOTOCONDUCTIVE LAYER; AN ELECTROLUMINESCENT LAYER MOUNTED ADJACENT TO SAID PHOTOTCONDUCTIVE LAYER; AND MEANS FOR ESTABLISHING ELECTRODES ACROSS THE SAID ELECTROLUMINESCENT LAYER IN EACH OF TWO DIRECTIONS WHICH ARE AT RIGHT ANGLES TO ONE ANOTHER; SAID MEANS FOR ESTABLISHING ELECTRODES INCLUDING A MEANS FOR IRRADIATING THE PHOTOCONDUCTIVE LAYER WITH A SCANNING NARROW WIDTH STRIP OF LIGHT WHICH STRETECHES IN LENGTH SUBSTANTIALLY FROM ONE END OF THE SAID PHOTOCONDUCTIVE LAYER TO THE OTHER END OF SAID PHOTOCONDUCTIVE LAYER WHEREBY AN ELECTRODE OF THE WIDTH AND LENGTH OF THE STRIP OF LIGHT CONTINUOUSLYMOVES OVER THE ELECTROLUMINESCENT LAYER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |