US3278749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical wave modulator
Assignee: AT&T Inc
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Filing: 1963-03-20
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Granted: 1966-10-11
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Expires: 1983-03-20
Abstract
No abstract record available.
Inventors
- 👤 Seidel Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:31
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/0344
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
AN OPTICAL WAVE MODULATOR COMPRISING: A LAYER OF ELECTRO-OPTICAL MATERIAL SURROUNDED BY A SECOND TRANSPARENT MATERIAL OF GREATER OPTICAL DENSITY; SAID LAYER HAVING A PAIR OF PLANAR, PARALLEL SURFACES SPACED APART A DISTANCE EQUAL TO AN INTEGRAL MULTIPLE OF HALF A GUIDED WAVELENGTH FOR SAID OPTICAL WAVE; MEANS FOR DIRECTING AN OPTICAL WAVE UPON ONE OF SAID SURFACES AT AN ANGLE OF INCIDENCE LESS THAN THE CRITICAL ANGLE FOR SAID MATERIALS BUT GREATER THAN APPROXIMATELY NINETY PERCENT OF SAID CRITICAL ANGLE; AND MEANS FOR PRODUCING A VARYING ELECTRIC FIELD WITHIN SAID ELECTRO-OPTICAL MATERIAL.
Claim 2
Dependent Claim
93 words
AN OPTICAL WAVE MODULATOR COMPRISING: A LAYER OF ELECTRO-OPTICAL MATERIAL SURROUNDED BY A SECOND TRANSPARENT MATERIAL OF GREATER OPTICAL DENSITY; SAID LAYER HAVING A PAIR OF PLANAR, PARALLEL SURFACES SPACED APART A DISTANCE EQUAL TO AN INTEGRAL MULTIPLE OF HALF A GUIDED WAVELENGTH FOR SAID OPTICAL WAVE; MEANS FOR DIRECTING AN OPTICAL WAVE UPON ONE OF SAID SURFACES AT AN ANGLE OF INCIDENCE LESS THAN THE CRITICAL ANGLE FOR SAID MATERIALS BUT GREATER THAN APPROXIMATELY NINETY PERCENT OF SAID CRITICAL ANGLE; AND MEANS FOR PRODUCING A VARYING ELECTRIC FIELD WITHIN SAID ELECTRO-OPTICAL MATERIAL.
References Cited (Backward Citations)
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US3102201A
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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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |