Patent US3173137A successfully refreshed from Google Patents.
US3173137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio warning system
Assignee: Motorola Solutions Inc
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Filing: 1960-04-18
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Granted: 1965-03-09
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Expires: 1980-04-18
Abstract
No abstract record available.
Inventors
- 👤 John F Byrne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:44
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/93; G01S13/933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
APPARATUS FOR USE IN AIRCRAFT INCLUDING IN COMBINATION, A TRANSMITTER FOR TRANSMITTING A CARRIER WAVE, SAID TRANSMITTER INCLUDING MEANS FOR FREQUENCY MODULATING THE CARRIER WAVE, CODER MEANS FOR PRODUCING A CODE SIGNAL HAVING A FREQUENCY RELATED TO THE ALTITUDE OF THE AIRCRAFT, CONTROL MEANS FOR ALLPYING SAID CODE SIGNAL TO SAID MODULATING MEANS AND FOR CAUSING INTERMITTENT OPERATION OF SAID TRANSMITTER TO PERIODICALLY TRANSMIT A CARRIER WAVE FREQUENCY MODULATED BY SAID CODE SIGNAL, RECEIVER MEANS FOR RECEIVING A CARRIER WAVE FREQUENCY MODULATED BY A CODE SIGNAL RELATED TO THE ALTITUDE OF OTHER AIRCRAFT AND FOR DERIVING THE FREQUENCY MODULATION CODE SIGNAL THEREFROM, DECODER MEANS FOR PRODUCING AN OUTPUT SIGNAL IN RESPONSE TO A RECEIVED CODE SIGNAL HAVING A FREQUENCY WITHIN A PREDETERMINED RANGE INCLUDING THE FREQUENCY OF SAID CODE SIGNAL PRODUCED BY SAID CODER MEANS, MEANS CONNECTING SAID DECODER MEANS TO SAID TRANSMITTER RESPONSIVE TO SAID OUTPUT SIGNAL TO CAUSE SAID TRANSMITTER TO TRANSMIT A REPLY SIGNAL BETWEEN PERIODS OF CODED FREQUENCY MODULATED TRANSMISSION, AND ALARM MEANS IN THE AIRCRAFT COUPLED TO SAID DECODER MEANS AND RESPONSIVE TO SAID OUTPUT SIGNAL.
Claim 2
Dependent Claim
181 words
APPARATUS FOR USE IN AIRCRAFT INCLUDING IN COMBINATION, A TRANSMITTER FOR TRANSMITTING A CARRIER WAVE, SAID TRANSMITTER INCLUDING MEANS FOR FREQUENCY MODULATING THE CARRIER WAVE, CODER MEANS FOR PRODUCING A CODE SIGNAL HAVING A FREQUENCY RELATED TO THE ALTITUDE OF THE AIRCRAFT, CONTROL MEANS FOR ALLPYING SAID CODE SIGNAL TO SAID MODULATING MEANS AND FOR CAUSING INTERMITTENT OPERATION OF SAID TRANSMITTER TO PERIODICALLY TRANSMIT A CARRIER WAVE FREQUENCY MODULATED BY SAID CODE SIGNAL, RECEIVER MEANS FOR RECEIVING A CARRIER WAVE FREQUENCY MODULATED BY A CODE SIGNAL RELATED TO THE ALTITUDE OF OTHER AIRCRAFT AND FOR DERIVING THE FREQUENCY MODULATION CODE SIGNAL THEREFROM, DECODER MEANS FOR PRODUCING AN OUTPUT SIGNAL IN RESPONSE TO A RECEIVED CODE SIGNAL HAVING A FREQUENCY WITHIN A PREDETERMINED RANGE INCLUDING THE FREQUENCY OF SAID CODE SIGNAL PRODUCED BY SAID CODER MEANS, MEANS CONNECTING SAID DECODER MEANS TO SAID TRANSMITTER RESPONSIVE TO SAID OUTPUT SIGNAL TO CAUSE SAID TRANSMITTER TO TRANSMIT A REPLY SIGNAL BETWEEN PERIODS OF CODED FREQUENCY MODULATED TRANSMISSION, AND ALARM MEANS IN THE AIRCRAFT COUPLED TO SAID DECODER MEANS AND RESPONSIVE TO SAID OUTPUT SIGNAL.
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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |