Patent US3173254A successfully refreshed from Google Patents.
Patent US3351940A successfully refreshed from Google Patents.
US3351940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave transhorizon broadcast radio system
Assignee: Individual
•
Filing: 1965-04-06
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Granted: 1967-11-07
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Expires: 1985-04-06
Abstract
No abstract record available.
Inventors
- 👤 Norman R Ortwein
- 👤 Clark A Potter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:02
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/24; H04B7/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
89 words
A RADIO STATION OF THE CLASS DESCRIBED FOR A SECURE COMMUNICATION SYSTEM COMPRISING: A TRANSMITTER AND A RECEIVER, TWO DIRECTIONAL ANTENNAS, EACH HAVING A RELATIVELY SHARP BEAMS PATTERN, THE BEAM PATTERNS BEING OPPOSITELY DIRECTED AND THE ANTENNAS BEING COUPLED, RESPECTIVELY TO SAID TRANSMITTER AND SAID RECEIVER, AND MEANS CONNECTED TO SAID ANTENNAS FOR EFFECTIVELY ROTATING SAID BEAM PATTERNS ABOUT A VERTICAL AXIS OF A CONSTANT SPEED AND WITH A PREDETERMINED ROTATIONAL PHASE ANGLE SO THAT THE TRANSMITTING BEAM SWEEPS PAST A REFERENCE AZIMUTH AT A PREDETERMINED INSTANT OF TIME.
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |