US3242805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor light modulator or detector
Assignee: US Philips Corp
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Filing: 1962-03-26
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Granted: 1966-03-29
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Expires: 1982-03-26
Abstract
No abstract record available.
Inventors
- 👤 Nicolas J Harrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:37
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/015; H; H03; H03C; H03C1/00; H03C1/36; H03C7/00; H03C7/02; H03C7/025; H03D; H03D7/00; G02F1/0155; G02F1/0156
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
AN ELECTRICAL DEVICE FOR MODULATING A BEAM OF RADIATION, COMPRISING A SEMICONDUCTIVE BODY SUBSTANTIALLY TRANSPARENT TO THE SAID RADIATION BEAM AND HAVING A RECEIVING SURFACE ARRANGED TO ADMIT THE SAID BEAM TO THE BODY INTERIOR AND A REFLECTING SURFACE ARRANGED TO INTERNALLY REFLECT SAID BEAM AT LEAST ONCE, THE BODY PORTIONS ADJACENT THE REFLECTING SURFACE CONTAINING A CONCENTRATION OF MAJORITY CHARGE CARRIERS IN EXCESS OF THAT PRESENT IN INTRINSIC CONDUCTIVITY, MEANS FOR ESTABLISHING AN ELECTRIC FIELD AND A SPACE CHARGE REGION WITHIN THE SAID BODY PORTIONS ADJACENT THE SAID REFLECTING SURFACE, MEANS PREVENTING SUBSTANTIAL INJECTION OF CHARGE CARRIES INTO SAID BODY, AND MEANS FOR VARYING THE ELECTRIC FIELD AND THUS THE MAJORITY CARRIER CONCENTRATION IN THE SAID SPACE CHARGE REGION TO THEREBY VARY THE BEAM INTENSITY AS IT TRAVERSES THE SPACE CHARGE REGION.
Claim 2
Dependent Claim
133 words
AN ELECTRICAL DEVICE FOR MODULATING A BEAM OF RADIATION, COMPRISING A SEMICONDUCTIVE BODY SUBSTANTIALLY TRANSPARENT TO THE SAID RADIATION BEAM AND HAVING A RECEIVING SURFACE ARRANGED TO ADMIT THE SAID BEAM TO THE BODY INTERIOR AND A REFLECTING SURFACE ARRANGED TO INTERNALLY REFLECT SAID BEAM AT LEAST ONCE, THE BODY PORTIONS ADJACENT THE REFLECTING SURFACE CONTAINING A CONCENTRATION OF MAJORITY CHARGE CARRIERS IN EXCESS OF THAT PRESENT IN INTRINSIC CONDUCTIVITY, MEANS FOR ESTABLISHING AN ELECTRIC FIELD AND A SPACE CHARGE REGION WITHIN THE SAID BODY PORTIONS ADJACENT THE SAID REFLECTING SURFACE, MEANS PREVENTING SUBSTANTIAL INJECTION OF CHARGE CARRIES INTO SAID BODY, AND MEANS FOR VARYING THE ELECTRIC FIELD AND THUS THE MAJORITY CARRIER CONCENTRATION IN THE SAID SPACE CHARGE REGION TO THEREBY VARY THE BEAM INTENSITY AS IT TRAVERSES THE SPACE CHARGE REGION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |