US3301625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor light modulators
Assignee: AT&T Inc
•
Filing: 1964-06-23
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Granted: 1967-01-31
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Expires: 1984-06-23
Abstract
No abstract record available.
Inventors
- 👤 Ashkin Arthur
- 👤 Gershenzon Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:24
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/06; H01S5/062; H01S5/0625; G; G02; G02F; G02F1/00; G02F1/01; G02F1/015; G02F1/025; G02F1/29; G02F1/31; G02F1/315
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A LIGHT MODULATOR COMPRISING A MEMBER OF SEMICONDUCTING MATERIAL HAVING REGIONS OF P TYPE AND N TYPE CONDUCTIVITY FORMING A LONGITUDINALLY EXTENDING JUNCTION, MEANS FOR APPLYING A REVERSE BIAS TO SAID JUNCTION, MEANS FOR DIRECTING A POLARIZED BEAM OF LIGHT INTO SAID JUNCTION FOR PROPOGATION THEREALONG, MEANS FOR VARYING THE POLARIZATION OF THE LIGHT PROPAGATING ALONG SAID JUNCTION IN ACCORDANCE WITH A MODULATING SIGNAL, AND MEANS FOR DETECTING THE AMOUNT OF POLARIZATION VARIATION.
Claim 2
Dependent Claim
73 words
A LIGHT MODULATOR COMPRISING A MEMBER OF SEMICONDUCTING MATERIAL HAVING REGIONS OF P TYPE AND N TYPE CONDUCTIVITY FORMING A LONGITUDINALLY EXTENDING JUNCTION, MEANS FOR APPLYING A REVERSE BIAS TO SAID JUNCTION, MEANS FOR DIRECTING A POLARIZED BEAM OF LIGHT INTO SAID JUNCTION FOR PROPOGATION THEREALONG, MEANS FOR VARYING THE POLARIZATION OF THE LIGHT PROPAGATING ALONG SAID JUNCTION IN ACCORDANCE WITH A MODULATING SIGNAL, AND MEANS FOR DETECTING THE AMOUNT OF POLARIZATION VARIATION.
References Cited (Backward Citations)
US2929923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |