Patent US3229286A successfully refreshed from Google Patents.
US3229286A
Expired / Lapsed
US
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Fm cw distance measuring system
Assignee: Individual
•
Filing: 1963-01-28
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Granted: 1966-01-11
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Expires: 1983-01-28
Abstract
No abstract record available.
Inventors
- 👤 Samuel James
- 👤 Salerno James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:31
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/34; G01S13/341
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A FREQUENCY-MODULATED, CONTINUOUS-WAVE RANGE TRACKING AND DISTANCE MEASURING SYSTEM COMPRISING: FREQUENCY PERIODIC WAVEFORM WHICH VARIES RANDOMLY IN AMPLITUDE, (B) A FREQUENCY MODULATED TRANSMITTER HAVING THE FREQUENCY OF ITS OUTPUT CONTROLLED BY SAID SIGNAL GENERATOR MEANS, (C) MEANS CONNECTED TO SAID FREQUENCY MODULATED TRANSMITTER FOR RADIATING ELECTROMAGNETIC ENERGY, (D) MEANS FOR RECEIVING REFLECTED ELECTROMAGNETIC ENERGY, (E) A FIRST MIXER CONNECTED TO SAID MEANS FOR RECEIVING REFLECTED ELECTROMAGNETIC ENERGY, (F) COUPLING MEANS CONNECTED TO SAID FREQUENCY MODULATED TRANSMITTER FOR COUPLING A PORTION OF THE OUTPUT OF SAID TRANSMITTER TO SAID FIRST MIXER, (G) FEEDBACK MEANS CONNECTED TO SAID FIRST MIXER FOR CONTROLLING THE OUTPUT OF SAID SIGNAL GENERATOR MEANS
Claim 2
Dependent Claim
107 words
A FREQUENCY-MODULATED, CONTINUOUS-WAVE RANGE TRACKING AND DISTANCE MEASURING SYSTEM COMPRISING: FREQUENCY PERIODIC WAVEFORM WHICH VARIES RANDOMLY IN AMPLITUDE, (B) A FREQUENCY MODULATED TRANSMITTER HAVING THE FREQUENCY OF ITS OUTPUT CONTROLLED BY SAID SIGNAL GENERATOR MEANS, (C) MEANS CONNECTED TO SAID FREQUENCY MODULATED TRANSMITTER FOR RADIATING ELECTROMAGNETIC ENERGY, (D) MEANS FOR RECEIVING REFLECTED ELECTROMAGNETIC ENERGY, (E) A FIRST MIXER CONNECTED TO SAID MEANS FOR RECEIVING REFLECTED ELECTROMAGNETIC ENERGY, (F) COUPLING MEANS CONNECTED TO SAID FREQUENCY MODULATED TRANSMITTER FOR COUPLING A PORTION OF THE OUTPUT OF SAID TRANSMITTER TO SAID FIRST MIXER, (G) FEEDBACK MEANS CONNECTED TO SAID FIRST MIXER FOR CONTROLLING THE OUTPUT OF SAID SIGNAL GENERATOR MEANS
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |