Patent US3674754A successfully refreshed from Google Patents.
Patent US3174148A successfully refreshed from Google Patents.
US3174148A
Expired / Lapsed
US
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Proximity measuring system
Assignee: Parsons Government Services Inc
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Filing: 1961-07-25
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Granted: 1965-03-16
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Expires: 1981-07-25
Abstract
No abstract record available.
Inventors
- 👤 Victor F Cartwright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:45
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/505
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
APPARATUS FOR INDICATING THE PROXIMITY OF A MISSILE WITHIN A PREDETERMINED RADIAL DISTANCE OF A TARGET COMPRISING AN OMNIDIRECTIONAL ANTENNA, A TRANSMITTER, MEANS FOR PERIODICALLY PULSING ON THE TRANSMITTER, MEANS PERIOD CORRESPONDING TO TWICE THE TIME IT TAKES A RADIO SIGNAL TO TRAVERSE A DISTANCE EQUAL TO TWICE THE PREDETERMINED RADIAL DISTANCE, A DETECTOR, MEANS FOR CONNECTING THE TRANSMITTER TO THE ANTENNA AND THE ANTENNA TO THE DETECTOR, SAID MEANS PROVIDING HIGH REJECTION OF SIGNALS BETWEEN THE TRANSMITTER AND THE DEECTOR AND LOW REJECTION OF SIGNALS BETWEEN THE ANTENNA AND THE DETECTOR, AND MEANS FOR RECORDING THE NUMBER OF CYCLES IN THE SIGNAL GENERATED AT THE OUTPUT OF THE DETECTOR AS THE MISSILE PASSES WITHIN SCORING RANGE OF THE TARGET.
Claim 2
Dependent Claim
120 words
APPARATUS FOR INDICATING THE PROXIMITY OF A MISSILE WITHIN A PREDETERMINED RADIAL DISTANCE OF A TARGET COMPRISING AN OMNIDIRECTIONAL ANTENNA, A TRANSMITTER, MEANS FOR PERIODICALLY PULSING ON THE TRANSMITTER, MEANS PERIOD CORRESPONDING TO TWICE THE TIME IT TAKES A RADIO SIGNAL TO TRAVERSE A DISTANCE EQUAL TO TWICE THE PREDETERMINED RADIAL DISTANCE, A DETECTOR, MEANS FOR CONNECTING THE TRANSMITTER TO THE ANTENNA AND THE ANTENNA TO THE DETECTOR, SAID MEANS PROVIDING HIGH REJECTION OF SIGNALS BETWEEN THE TRANSMITTER AND THE DEECTOR AND LOW REJECTION OF SIGNALS BETWEEN THE ANTENNA AND THE DETECTOR, AND MEANS FOR RECORDING THE NUMBER OF CYCLES IN THE SIGNAL GENERATED AT THE OUTPUT OF THE DETECTOR AS THE MISSILE PASSES WITHIN SCORING RANGE OF THE TARGET.
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) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |