US3196743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light modulation device employing a scotophoric light valve
Assignee: Polacoat Inc
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Filing: 1961-09-29
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Granted: 1965-07-27
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Expires: 1981-09-29
Abstract
No abstract record available.
Inventors
- 👤 John F Dreyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:13
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A DEVICE FOR LIGHT MODULATION COMPRSING A LIGHT BEAM AND A LIGHT VALVE THEREIN, SAID LIGHT VALVE COMPRISING A PELLUCID SCOTOPHOR HAVING MOBILE COLOR CENTERS THEREIN AND HAVING A PLURALITY OF DIFFERENT DISCRETE CRYSTAL PORTIONS IN WHICH THE PRESENCE OF SAID MOBILE COLOR CENTERS IMPARTS CHARACTERISTIC PEAK LIGHT ADSORPTION AT DIFFERENT WAVELENGTHS, SAID CRYSTAL PORTIONS BEING CONTIGUOUS AND ELECTRICALLY CONTINUOUS, AND MEANS FOR ESTABLISHING A VARIABLE POTENTIAL GRADIENT IN SAID SCOTOPHOR, WHEREBY THE RELATIVE NUMBER AND POSITION OF COLOR CENTERS IN EACH OF SAID PLURALITY OF CRYSTAL PORTIONS CAN BE VARIED.
Claim 2
Independent Claim
91 words
A DEVICE FOR LIGHT MODULATION COMPRSING A LIGHT BEAM AND A LIGHT VALVE THEREIN, SAID LIGHT VALVE COMPRISING A PELLUCID SCOTOPHOR HAVING MOBILE COLOR CENTERS THEREIN AND HAVING A PLURALITY OF DIFFERENT DISCRETE CRYSTAL PORTIONS IN WHICH THE PRESENCE OF SAID MOBILE COLOR CENTERS IMPARTS CHARACTERISTIC PEAK LIGHT ADSORPTION AT DIFFERENT WAVELENGTHS, SAID CRYSTAL PORTIONS BEING CONTIGUOUS AND ELECTRICALLY CONTINUOUS, AND MEANS FOR ESTABLISHING A VARIABLE POTENTIAL GRADIENT IN SAID SCOTOPHOR, WHEREBY THE RELATIVE NUMBER AND POSITION OF COLOR CENTERS IN EACH OF SAID PLURALITY OF CRYSTAL PORTIONS CAN BE VARIED.
References Cited (Backward Citations)
US2811898A
Cited
US2776367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |