Patent US3171121A successfully refreshed from Google Patents.
US3171121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft collision warning system
Assignee: Individual
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Filing: 1963-02-13
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Granted: 1965-02-23
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Expires: 1983-02-13
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Solga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:57
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/93; G01S13/933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A COLLISON WARNING DEVICE: TRANSMITTER MEANS TRANSMITTING AN INTERROGATING PULSE AT A PREDETERMINED PULSE REPETITION FREQUENCY, RECEIVER MEANS FOR RECEIVING AN ANSWER PULSE TO SAID INTERROGATING PULSE, MULTIVIBRATOR MEANS CONNECTED TO SAID RECEIVER MEANS GATING SAID RECEIVER MEANS ON FOR A PREDETERMINED PERIOD FOLLOWING EACH TRANSMITTED INTERROGATING PULSE, COUNTER MEANS CONNECTED TO SAID RECEIVER MEANS PROVIDING A COUNT PROPORTIONAL TO THE TIME INTERVAL BETWEEN TRANSMISSION OF AN INTERROGATING PULSE AND RECEIPT OF AN ANSWER PULSE DURING THE GATE-ON INTERVAL OF SAID RECEIVER MEANS, COMPUTER MEANS CONNECTED TO SAID COUNTER MEANS FOR COMPARING SUCCESSIVE COUNTS WITHIN SAID COUNTER PROVIDING AN OUTPUT WHEN THE DIFFERENCE BETWEEN SUCCESSSIVE COUNTS IS CONSTANT, DISPLAY MEANS CONNECTED TO SAID COMPUTER MEANS PROVIDING AN INDICATION WHEN THE DIFFERENCE BETWEEN SUCCESSIVE COUNTS IS CONSTANT, SAID COUNTER MEANS COM-
Claim 2
Dependent Claim
131 words
IN A COLLISON WARNING DEVICE: TRANSMITTER MEANS TRANSMITTING AN INTERROGATING PULSE AT A PREDETERMINED PULSE REPETITION FREQUENCY, RECEIVER MEANS FOR RECEIVING AN ANSWER PULSE TO SAID INTERROGATING PULSE, MULTIVIBRATOR MEANS CONNECTED TO SAID RECEIVER MEANS GATING SAID RECEIVER MEANS ON FOR A PREDETERMINED PERIOD FOLLOWING EACH TRANSMITTED INTERROGATING PULSE, COUNTER MEANS CONNECTED TO SAID RECEIVER MEANS PROVIDING A COUNT PROPORTIONAL TO THE TIME INTERVAL BETWEEN TRANSMISSION OF AN INTERROGATING PULSE AND RECEIPT OF AN ANSWER PULSE DURING THE GATE-ON INTERVAL OF SAID RECEIVER MEANS, COMPUTER MEANS CONNECTED TO SAID COUNTER MEANS FOR COMPARING SUCCESSIVE COUNTS WITHIN SAID COUNTER PROVIDING AN OUTPUT WHEN THE DIFFERENCE BETWEEN SUCCESSSIVE COUNTS IS CONSTANT, DISPLAY MEANS CONNECTED TO SAID COMPUTER MEANS PROVIDING AN INDICATION WHEN THE DIFFERENCE BETWEEN SUCCESSIVE COUNTS IS CONSTANT, SAID COUNTER MEANS COM-
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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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |