Patent US3355663A successfully refreshed from Google Patents.
US3355663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waveguide echo measurement system
Assignee: Western Union Telegraph Co
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Filing: 1964-07-20
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Granted: 1967-11-28
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Expires: 1984-07-20
Abstract
No abstract record available.
Inventors
- 👤 Aronoff Ethan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:21
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/28; G01R27/32; G01R31/00; G01R31/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
121 words
A MICROWAVE MEASUREMENT DEVICE FOR WAVE CONDUITS COMPRISING A MICROWAVE OSCILLATOR HAVING AN INTERNAL LINEAR FREQUENCY SWEEP, AN INPUT CONNECTION FOR MODULATION THEREOF AND AN OUTPUT CONNECTION FOR THE LINEAR SWEEP VOLTAGE THEREOF, PROBE MEANS COMPRISING A SECTION OF WAVEGUIDE AND A PAIR OF ELECTROSTATIC PROBES ADJUSTABLY MOUNTED THEREIN AND LONGITUDINALLY SEPARATED A QUARTER WAVELENGTH, INTERCONNECTING SAID OSCILLATOR AND SAID WAVE CONDUIT, INDICATOR MEANS FOR DETERMINING THE FREQUENCY AND AMPLITUDE OF A BEAT NOTE, BALANCED DEMODULATOR MEANS INTERCONNECTING SAID PROBE MEANS AND SAID INDICATOR MEANS, AND A NETWORK COMPRISING A SERIES CAPACITOR FOLLOWED BY A VARIABLE SHUNT RESISTOR CONNECTED FROM SAID OUTPUT CONNECTION TO SAID INPUT CONNECTION OF SAID OSCILLATOR WHEREBY THE FREQUENCY OF SAID BEAT NOTE IS RENDERED SUBSTANTIALLY INVARIANT.
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) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |