Patent US3112481A successfully refreshed from Google Patents.
US3112481A
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Continuous wave frequency modulation distance measuring apparatus
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1957-12-20
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Granted: 1963-11-26
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Expires: 1977-12-20
Abstract
No abstract record available.
Inventors
- 👤 Goldberg Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:37
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/34; G01S13/342
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN A CONTINUOUS-WAVE FREQUENCY-MODULATION RADIO DISTANCE MEASURING SYSTEM HAVING MEANS FOR RADIATING A FREQUENCY-MODULATED CARRIER WAVE, MEANS FOR RECEIVING SAID FREQUENCY-MODULATED CARRIER WAVE AFTER REFLECTION FROM A SPACED BODY, AND MEANS FOR PRODUCING FROM SAID RECEIVED WAVE A SIGNAL HAVING THE WAVEFORM OF A FREQUENCY-MODULATED WAVE WHOSE MODULATION INDEX IS A FUNCTION BOTH OF RANGE TO SAID BODY AND OF THE FREQUENCY DEVIATION OF SAID RADIATED CARRIER WAVE, THE IMPROVEMENT COMPRISING MEANS, INCLUDING MEANS FOR ADJUSTING A CHARACTERISTIC OF SAID RADIATED WAVE FOR MAINTAINING A PREDETERMINED SIDE BAND OF SAID PRODUCED SIGNAL AT A MAXIMUM AMPLITUDE DESPITE CHANGES IN DISTANCE TO SAID BODY, AND A DISTANCE INDICATOR RESPONSIVE TO SAID ADJUSTING MEANS.
Claim 2
Dependent Claim
112 words
IN A CONTINUOUS-WAVE FREQUENCY-MODULATION RADIO DISTANCE MEASURING SYSTEM HAVING MEANS FOR RADIATING A FREQUENCY-MODULATED CARRIER WAVE, MEANS FOR RECEIVING SAID FREQUENCY-MODULATED CARRIER WAVE AFTER REFLECTION FROM A SPACED BODY, AND MEANS FOR PRODUCING FROM SAID RECEIVED WAVE A SIGNAL HAVING THE WAVEFORM OF A FREQUENCY-MODULATED WAVE WHOSE MODULATION INDEX IS A FUNCTION BOTH OF RANGE TO SAID BODY AND OF THE FREQUENCY DEVIATION OF SAID RADIATED CARRIER WAVE, THE IMPROVEMENT COMPRISING MEANS, INCLUDING MEANS FOR ADJUSTING A CHARACTERISTIC OF SAID RADIATED WAVE FOR MAINTAINING A PREDETERMINED SIDE BAND OF SAID PRODUCED SIGNAL AT A MAXIMUM AMPLITUDE DESPITE CHANGES IN DISTANCE TO SAID BODY, AND A DISTANCE INDICATOR RESPONSIVE TO SAID ADJUSTING MEANS.
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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) | 1966-11-25 | 1967-05-27 | 1967-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-25 | 1971-05-27 | 1971-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-25 | 1975-05-27 | 1975-11-26 | $7700.00 | Window Closed / Lapsed |