US3331036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical wave modulators and attenuators
Assignee: AT&T Inc
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Filing: 1964-10-05
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Granted: 1967-07-11
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Expires: 1984-10-05
Abstract
No abstract record available.
Inventors
- 👤 Colbow Konrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:14
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/015; G02F1/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN COMBINATION; A COMPENSATED SEMICONDUCTOR ELEMENT CONTAINING CONCENTRATIONS OF BOTH ACCEPTOR AND DONOR IMPURITIES OF THE ORDER OF 1015 TO 1019 ATOMS PER CUBIC CENTIMETER THROUGHOUT SAID SEMICONDUCTOR ELEMENT; SAID ELEMENT CHARACTERIZED BY THE PRESENCE OF DONORACCEPTOR IMPURITY PAIRS; MEANS FOR IMPRESSING AN ELECTRIC FIELD ACROSS SAID ELEMENT; AND A SOURCE OF OPTICAL WAVE ENERGY HAVING A FREQUENCY WITHIN THE FREQUENCY BAND DEFINED BY THE DISTRIBUTION OF ENERGY LEVEL DIFFERENCES BETWEEN DONOR-ACCEPTOR IMPURITY PAIRS DIRECTED UPON SAID ELEMENTS.
Claim 2
Dependent Claim
78 words
IN COMBINATION; A COMPENSATED SEMICONDUCTOR ELEMENT CONTAINING CONCENTRATIONS OF BOTH ACCEPTOR AND DONOR IMPURITIES OF THE ORDER OF 1015 TO 1019 ATOMS PER CUBIC CENTIMETER THROUGHOUT SAID SEMICONDUCTOR ELEMENT; SAID ELEMENT CHARACTERIZED BY THE PRESENCE OF DONORACCEPTOR IMPURITY PAIRS; MEANS FOR IMPRESSING AN ELECTRIC FIELD ACROSS SAID ELEMENT; AND A SOURCE OF OPTICAL WAVE ENERGY HAVING A FREQUENCY WITHIN THE FREQUENCY BAND DEFINED BY THE DISTRIBUTION OF ENERGY LEVEL DIFFERENCES BETWEEN DONOR-ACCEPTOR IMPURITY PAIRS DIRECTED UPON SAID ELEMENTS.
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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |