Patent US3247765A successfully refreshed from Google Patents.
US3247765A
Expired / Lapsed
US
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Light switching means
Assignee: International Business Machines Corp
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Filing: 1961-07-05
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Granted: 1966-04-26
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Expires: 1981-07-05
Abstract
No abstract record available.
Inventors
- 👤 Cocca Ubert
- 👤 Pecoraro Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:11
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/015
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
A LIGHT SWITCH FOR CONTROLLING A NARROW BANDPASS BEAM OF LIGHT DIRECTED ALONG A DEFINITE PATH, COMPRISING: A BODY OF MATERIAL HAVING A NEGATIVE TEMPERATURE COEFFICIENT OF RESISTANCE AND A VARIABLE RADIATION ABSORPTION EDGE ARRANGED IN THE PATH OF SAID BEAM; ELECTRIC FIELD GENERATING MEANS FOR ESTABLISHING AN ELECTRIC FIELD ACROSS SAID BODY; AND MAGNETIC FIELD GENERATING MEANS DISPOSED ADJACENT SAID PATH FOR DIRECTING A FIELD ACROSS SAID BODY TRANSVERSELY OF SAID ELECTRIC FIELD, SAID MAGNETIC AND ELECTRICAL FIELDS BEING SIMULTANEOUSLY ACTIVATED BY THEIR RESPECTIVE MEANS TO CONTROL THE INTENSITY OF SAID BEAM EMANATING FROM SAID BODY, SAID PATH HAVING A DIRECTION DIFFERENT FROM THE DIRECTIONS OF EACH OF SAID FIELDS.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |