Patent US3108273A successfully refreshed from Google Patents.
US3108273A
Expired / Lapsed
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Continuous wave narrow recognition zone radar system
Assignee: International Telephone and Telegraph Corp
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Filing: 1958-03-31
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Granted: 1963-10-22
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Expires: 1978-03-31
Abstract
No abstract record available.
Inventors
- 👤 Stephen J Erst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:59
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A CONTINUOUS WAVE, NARROW RECOGNITION ZONE RADAR SYSTEM COMPRISING: MEANS FOR PROVIDING A SIGNAL FREQUENCY MODULATED BY A SAWTOOTH WAVEFORM SIGNAL; MEANS FOR TRANSMITTING SAID FREQUENCY-MODULATED SIGNAL; MEANS FOR RECEIVING SAID FREQUENCY-MODULATED SIGNAL REFLECTED FROM A DISTANT OBJECT; MEANS FOR MIXING A SIGNAL RESPONSIVE TO THE TRANSMITTED FREQUENCY MODULATED SIGNAL WITH THE RECEIVED FREQUENCY MODULATED SIGNAL AND HAVING OUTPUT CIRCUIT MEANS FOR PROVIDING AN OUTPUT SIGNAL RESULTING FROM SAID MIXING; BAND PASS FILTER MEANS; AND MEANS COUPLING SAID OUTPUT CIRCUIT MEANS TO SAID BAND PASS FILTER MEANS FOR COUPLING SAID OUTPUT SIGNAL THERETO; SAID BAND PASS FILTER MEANS BEING TUNED TO PASS ONLY THE DOPPLER FREQUENCY BAND CONTAINED IN SAID OUTPUT SIGNAL.
Claim 2
Dependent Claim
112 words
A CONTINUOUS WAVE, NARROW RECOGNITION ZONE RADAR SYSTEM COMPRISING: MEANS FOR PROVIDING A SIGNAL FREQUENCY MODULATED BY A SAWTOOTH WAVEFORM SIGNAL; MEANS FOR TRANSMITTING SAID FREQUENCY-MODULATED SIGNAL; MEANS FOR RECEIVING SAID FREQUENCY-MODULATED SIGNAL REFLECTED FROM A DISTANT OBJECT; MEANS FOR MIXING A SIGNAL RESPONSIVE TO THE TRANSMITTED FREQUENCY MODULATED SIGNAL WITH THE RECEIVED FREQUENCY MODULATED SIGNAL AND HAVING OUTPUT CIRCUIT MEANS FOR PROVIDING AN OUTPUT SIGNAL RESULTING FROM SAID MIXING; BAND PASS FILTER MEANS; AND MEANS COUPLING SAID OUTPUT CIRCUIT MEANS TO SAID BAND PASS FILTER MEANS FOR COUPLING SAID OUTPUT SIGNAL THERETO; SAID BAND PASS FILTER MEANS BEING TUNED TO PASS ONLY THE DOPPLER FREQUENCY BAND CONTAINED IN SAID OUTPUT SIGNAL.
References Cited (Backward Citations)
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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) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |