US3457414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarized color optical communication system
Assignee: Avco Corp
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Filing: 1964-08-20
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Granted: 1969-07-22
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Expires: 1984-08-20
Abstract
No abstract record available.
Inventors
- 👤 Jack R Ragen
- 👤 Donald J Loughry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:11
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/11; H04B10/112; G; G02; G02F; G02F1/00; G02F1/01; G02F1/09; G02F1/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A COMMUNICATION SYSTEM, THE COMBINATION COMPRISING: A DOUBLE REFRACTING PLATE WITH DIELECTRIC PHASING PROPERTIES, SAID PLATE HAVINE CHARACTERISTICS TO PROVIDE A PHASE SHIFT OF PLANE POLARIZED LIGHT TO PRODUCE A SELECTED COLOR COMPONENT AND THE COMPLEMENTARY COLOR COMPONENT OF SAID COLOR IN QUADRATURE POLARIZATION; A SOURCE OF PLANE POLARIZED LIGHT, RAYS FROM SAID SOURCE OF PLANE POLARIZED LIGHT BEING TRANSMITTED THROUGH SAID PLATE; MODULATING MEANS FOR SIMULTANEOUSLY ROTATING BOTH SAID SELECTED COLOR COMPONENT AND SAID COMPLEMENTARY COMPONENT ON AN AXIS PARALLEL TO THE PATH OF TRANSMISSION OF SAID RAYS, SAID SELECTED COLOR COMPONENT AND SAID COMPLEMENTARY COLOR COMPONENT IN ACCORDANCE WITH SIGNAL; AND DEMODULATING MEANS FOR DEMODULATION SAID MODULATED SELECTED COLOR COMPONENT AND SAID COMPLEMENTARY COLOR COMPONENT TO DERIVE SAID SIGNAL; SAID DEMODLULATING MEANS INCLUDING A POLARIZATION ANALYZER HAVING
Claim 2
Dependent Claim
130 words
IN A COMMUNICATION SYSTEM, THE COMBINATION COMPRISING: A DOUBLE REFRACTING PLATE WITH DIELECTRIC PHASING PROPERTIES, SAID PLATE HAVINE CHARACTERISTICS TO PROVIDE A PHASE SHIFT OF PLANE POLARIZED LIGHT TO PRODUCE A SELECTED COLOR COMPONENT AND THE COMPLEMENTARY COLOR COMPONENT OF SAID COLOR IN QUADRATURE POLARIZATION; A SOURCE OF PLANE POLARIZED LIGHT, RAYS FROM SAID SOURCE OF PLANE POLARIZED LIGHT BEING TRANSMITTED THROUGH SAID PLATE; MODULATING MEANS FOR SIMULTANEOUSLY ROTATING BOTH SAID SELECTED COLOR COMPONENT AND SAID COMPLEMENTARY COMPONENT ON AN AXIS PARALLEL TO THE PATH OF TRANSMISSION OF SAID RAYS, SAID SELECTED COLOR COMPONENT AND SAID COMPLEMENTARY COLOR COMPONENT IN ACCORDANCE WITH SIGNAL; AND DEMODULATING MEANS FOR DEMODULATION SAID MODULATED SELECTED COLOR COMPONENT AND SAID COMPLEMENTARY COLOR COMPONENT TO DERIVE SAID SIGNAL; SAID DEMODLULATING MEANS INCLUDING A POLARIZATION ANALYZER HAVING
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) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |