US3072900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doppler radar systems
Assignee: Marconis Wireless Telegraph Co Ltd
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Filing: 1958-07-31
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Granted: 1963-01-08
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Expires: 1978-07-31
Abstract
No abstract record available.
Inventors
- 👤 Beck Geoffrey Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:17
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A DOPPLER RADAR SYSTEM INCLUDING MEANS FOR TRANSMITTING TWO DIRECTIONAL RADIO BEAMS AT A PREDETERMINED SMALL ANGLE TO ONE ANOTHER, MEANS FOR RECEIVING RESULTANT ECHO SIGNALS, MEANS FOR DERIVING A DOPPLER BAND OF FREQUENCIES PRESENT IN THE ECHO SIGNALS DUE TO ONE BEAM WHEN SAID BEAM ENCOUNTERS A RELATIVELY MOVING TARGET, MEANS FOR DERIVING AN OVERLAPPING DOPPLER BAND OF FREQUENCIES PRESENT IN THE ECHO SIGNALS DUE TO THE OTHER BEAM WHEN SAID OTHER BEAM ENCOUNTERS SAID TARGET, MEANS FOR MIXING EACH OF THE DERIVED BANDS WITH A VARIABLE LOCAL FREQUENCY, AMPLITUDE COMPARING MEANS FOR COMPARING THE AMPLITUDES OF THE TWO RESULTANTS OF MIXING, MEANS RE-
Claim 2
Dependent Claim
105 words
A DOPPLER RADAR SYSTEM INCLUDING MEANS FOR TRANSMITTING TWO DIRECTIONAL RADIO BEAMS AT A PREDETERMINED SMALL ANGLE TO ONE ANOTHER, MEANS FOR RECEIVING RESULTANT ECHO SIGNALS, MEANS FOR DERIVING A DOPPLER BAND OF FREQUENCIES PRESENT IN THE ECHO SIGNALS DUE TO ONE BEAM WHEN SAID BEAM ENCOUNTERS A RELATIVELY MOVING TARGET, MEANS FOR DERIVING AN OVERLAPPING DOPPLER BAND OF FREQUENCIES PRESENT IN THE ECHO SIGNALS DUE TO THE OTHER BEAM WHEN SAID OTHER BEAM ENCOUNTERS SAID TARGET, MEANS FOR MIXING EACH OF THE DERIVED BANDS WITH A VARIABLE LOCAL FREQUENCY, AMPLITUDE COMPARING MEANS FOR COMPARING THE AMPLITUDES OF THE TWO RESULTANTS OF MIXING, MEANS RE-
References Cited (Backward Citations)
US2855590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |