Patent US3272988A successfully refreshed from Google Patents.
US3272988A
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Polarization modulation system for transmitting and receiving two independent signals over a single electromagnetic carrier
Assignee: Verizon Laboratories Inc
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Filing: 1963-03-25
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Granted: 1966-09-13
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Expires: 1983-03-25
Abstract
No abstract record available.
Inventors
- 👤 Louis R Bloom
- 👤 Carl F Buhrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:09
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/09; H; H04; H04B; H04B10/00; H04B10/50; H04B10/516; H04B10/532
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN A SIGNAL TRANSMISSION SYSTEM FOR MODULATING A LIGHT BEAM BY FIRST AND SECOND INDEPENDENT SIGNALS AND FOR DETECTING SAID SIGNALS, A RECEIVER COMPRISING (A) A POLARIZING PRISM FOR RECEIVING A LIGHT SIGNAL HAVING HORIZONTALLY AND VERTICALLY POLARIZED COMPONENTS, ONE OF SAID COMPONENTS BEING TRANSMITTED ALONG A FIRST PATH IN SAID PRISM AND THE OTHER OF SAID COMPONENTS BEING TRANSMITTED ALONG A SECOND PATH IN SAID PRISM, (B) FIRST AND SECOND PHOTOCELLS POSITIONED IN THE PATHS, OF SAID FIRST AND SECOND COMPONENTS RESPECTIVELY, AND (C) MEANS FOR COMBINING THE OUTPUT OF SAID FIRST AND SECOND PHOTOCELLS, THE OUTPUT OF SAID MEANS BEING PROPORTIONAL TO ONE OF SAID INDEPENDENT SIGNALS.
Claim 2
Dependent Claim
109 words
IN A SIGNAL TRANSMISSION SYSTEM FOR MODULATING A LIGHT BEAM BY FIRST AND SECOND INDEPENDENT SIGNALS AND FOR DETECTING SAID SIGNALS, A RECEIVER COMPRISING (A) A POLARIZING PRISM FOR RECEIVING A LIGHT SIGNAL HAVING HORIZONTALLY AND VERTICALLY POLARIZED COMPONENTS, ONE OF SAID COMPONENTS BEING TRANSMITTED ALONG A FIRST PATH IN SAID PRISM AND THE OTHER OF SAID COMPONENTS BEING TRANSMITTED ALONG A SECOND PATH IN SAID PRISM, (B) FIRST AND SECOND PHOTOCELLS POSITIONED IN THE PATHS, OF SAID FIRST AND SECOND COMPONENTS RESPECTIVELY, AND (C) MEANS FOR COMBINING THE OUTPUT OF SAID FIRST AND SECOND PHOTOCELLS, THE OUTPUT OF SAID MEANS BEING PROPORTIONAL TO ONE OF SAID INDEPENDENT SIGNALS.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |