US3440424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system for transmitting and receiving two independent signals over a single electromagnetic carrier wherein the rotational orientation of the receiver is independent of the angular position of the transmitter
Assignee: Verizon Laboratories Inc
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Filing: 1964-07-16
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Granted: 1969-04-22
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Expires: 1984-07-16
Abstract
No abstract record available.
Inventors
- 👤 Carl F Buhrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:16
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/11; H04B10/112; H04B10/1121; G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; H04J; H04J14/00; H04J14/06
Claims Analysis
Total Claims: 0
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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) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |