Patent US3101469A successfully refreshed from Google Patents.
US3101469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase coherent radar system
Assignee: Varian Medical Systems Inc
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Filing: 1953-05-28
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Granted: 1963-08-20
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Expires: 1973-05-28
Abstract
No abstract record available.
Inventors
- 👤 Russell H Varian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:26
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/581; G01S13/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A RADAR SYSTEM FOR DETECTING OBJECTS COMPRISING TRANSMITTER MEANS FOR TRANSMITTING A PHASE COHERENT PULSE SIGNAL AT CARRIER FREQUENCY, SAID SIGNAL BEING COHERENT OVER A MULTIPLICITY OF TRANSMITTED PULSES, A LOCAL OSCILLATOR, A BALANCED MIXER CONNECTED FOR MIXING THE CARRIER SIGNAL FROM SAID TRANSMITTER MEANS WITH THE OUTPUT FOR SAID LOCAL OSCILLATOR TO PRODUCE TWO FREQUENCIES WHICH ARE EACH DISPLACED A FIXED AMOUNT FROM THE ORIGINAL CARRIER FREQUENCY THEREBY ENHANCING THE SIGNAL-TO-NOISE RATIO, RECEIVER MEANS FOR RECEIVING REFLECTED SIGNALS FROM TARGETS AND FOR MIXING SAID RETURN SIGNALS WITH THE OUTPUT OF SAID BALANCED MIXER, AND AMPLIFYING SAID MIXED SIGNALS, MEANS FOR DETECTING THE AMPLIFIED SIGNALS, AND A MULTIPLE OBJECT INDICATOR CONNECTED FOR RECEIVING SUCH SIGNALS AND INDICATING RANGE INFORMATION AND A QUANTITATIVE MEASUREMENT OF THE RELATIVE VELOCITY OF THE OBJECTS VIEWED WITH
Claim 2
Dependent Claim
132 words
A RADAR SYSTEM FOR DETECTING OBJECTS COMPRISING TRANSMITTER MEANS FOR TRANSMITTING A PHASE COHERENT PULSE SIGNAL AT CARRIER FREQUENCY, SAID SIGNAL BEING COHERENT OVER A MULTIPLICITY OF TRANSMITTED PULSES, A LOCAL OSCILLATOR, A BALANCED MIXER CONNECTED FOR MIXING THE CARRIER SIGNAL FROM SAID TRANSMITTER MEANS WITH THE OUTPUT FOR SAID LOCAL OSCILLATOR TO PRODUCE TWO FREQUENCIES WHICH ARE EACH DISPLACED A FIXED AMOUNT FROM THE ORIGINAL CARRIER FREQUENCY THEREBY ENHANCING THE SIGNAL-TO-NOISE RATIO, RECEIVER MEANS FOR RECEIVING REFLECTED SIGNALS FROM TARGETS AND FOR MIXING SAID RETURN SIGNALS WITH THE OUTPUT OF SAID BALANCED MIXER, AND AMPLIFYING SAID MIXED SIGNALS, MEANS FOR DETECTING THE AMPLIFIED SIGNALS, AND A MULTIPLE OBJECT INDICATOR CONNECTED FOR RECEIVING SUCH SIGNALS AND INDICATING RANGE INFORMATION AND A QUANTITATIVE MEASUREMENT OF THE RELATIVE VELOCITY OF THE OBJECTS VIEWED WITH
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-19 | 1967-02-18 | 1967-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-19 | 1971-02-18 | 1971-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-19 | 1975-02-18 | 1975-08-20 | $7700.00 | Window Closed / Lapsed |