US3562746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Character display device employing optical laminas of light piping elements
Assignee: Individual
•
Filing: 1968-12-12
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Granted: 1971-02-09
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Expires: 1988-12-12
Abstract
Abstract A CHARACTER DISPLAY DEVICE EMPLOYS A PLURALITY OF OPTICAL LAMINAS FORMED OF JUXTAPOSED OPTICAL FIBERS TO SERVE AS LIGHT GUIDES. SELECTED FIBERS IN CERTAIN ONES OF THE LAMINAS ARE BACKED UP BY SELECTIVELY OPERATED LAMPS TO DISPLAY CHARACTERS AT FRONT ENDS OF LAMINAS. THE LAMINAS ARE FABRICATED INTO A DISPLAY DEVICE SO THAT THEY ABSORB THE AMBIENT LIGHT IMPINGING ON THEIR FRONT ENDS. THUS, THE DISPLAY DEVICE APPEARS BLACK IN THE ABSENCE OF INTERNAL ILLUMINATION FROM THE LAMPS. ILLUMINATED LAMINA PRESENT LUMINOUS LINES AGAINST A BLACK BACKGROUND EVEN IN THE PRESENCE OF HIGH AMBIENT LIGHT LEVELS.
Inventors
- 👤 Mitchell Aron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:32
CPC Classifications
G; G09; G09F; G09F9/00; G09F9/30; G09F9/305; G02; G02B; G02B6/00; G02B6/0001; G02B6/0005; G02B6/24; G02B6/42; G02B6/4298; G08; G08B; G08B5/00; G08B5/22; G08B5/36; G09F9/302; G09F9/3023
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |