US3215038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid solution electro-optic light switch using the stark effect
Assignee: International Business Machines Corp
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Filing: 1961-11-15
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Granted: 1965-11-02
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Expires: 1981-11-15
Abstract
No abstract record available.
Inventors
- 👤 William R Heller
- 👤 Kumamoto Junji
- 👤 Jr John C Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:35
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/17; G02F1/174
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
134 words
A LIGHT SWITCHING SYSTEM WHICH COMPRISES A MONOCHROMATIC LIGHT SOURCE, A LENS SYSTEM FOR FOCUSING THE RADIATION FROM SAID LIGHT SOURCE INTO A BEAM, AN ELECTROOPTIC SWITCHING ELEMENT INTERPOSED IN SAID LIGHT BEAM COMPRISING A LAYER OF SOLID SOLUTION OF METHYL RED (C15H15O2N3) DISSOLVED IN POLYSTYRENE HAVING TWO TRANSPARENT CONDUCTIVE ELECTRODES ON OPPOSITE SIDES THEREOF IN SURFACE TO SURFACE CONTACT THEREWITH AND A PHOTO-SENSITIVE DEVICE LOCATED ON THE OPPOSITE SIDE OF SAID ELECTROOPTIC ELEMENT FROM THE LIGHT SOURCE SUCH THAT IT RECEIVES THE LIGHT BEAM TRANSMITTED THROUGH SAID ELEMENT, AND SUITABLE AMPLIFYING AND DETECTING MEANS ELECTRICALLY CONNECTED TO SAID PHOTO-SENSITIVE ELEMENT FOR DETECTING A DIFFERENCE IN LIGHT INTENSITY PASSING THROUGH SAID ELECTROOPTIC ELEMENT WHEN AN ELECTRIC FIELD IS APPLIED THERETO THE OVERALL OPTICAL DENSITY OF SAID SWITCHING ELEMENT BEING BETWEEN ABOUT 0.3 AND 15.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |