Patent US3264646A successfully refreshed from Google Patents.
US3264646A
Expired / Lapsed
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Passive perimeter intrusion detection system
Assignee: Individual
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Filing: 1963-12-18
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Granted: 1966-08-02
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Expires: 1983-12-18
Abstract
No abstract record available.
Inventors
- 👤 Gale Manfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:22
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/18; G08B13/189; G08B13/19; G01; G01S; G01S11/00; G01S11/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PASSIVE INTRUSION DETECTION SYSTEM ACTIVATED BY NATURAL THERMAL RADIATION COMPRISING: (A) AN ACQUISITION ANTENNA THE AXIS OF WHICH IS DIRECTED ALONG A PREDETERMINED PATH; (B) A REFERENCE ANTENNA DIRECTED TOWARD A SELECTED POINT IN THE ATMOSPHERE; (C) A WAVE ENERGY REFLECTING SURFACE DISPOSED IN SAID PREDETERMINED PATH OPPOSITE SAID ACQUISITION ANTENNA AND ORIENTED TO REFLECT RADIATION FROM SAID SELECTED POINT IN THE ATMOSPHERE ALONG SAID AXIS OF THE ACQUISITION ANTENNA TO THE ACQUISITION ANTENNA; AND (D) MEANS CONNECTING SAID REFERENCE ANTENNA AND SAID ACQUISITION ANTENNA TO AN ELECTRICAL SIGNAL AMPLITUDE RESPONSIVE COMPARISON CIRCUIT.
Claim 2
Dependent Claim
94 words
A PASSIVE INTRUSION DETECTION SYSTEM ACTIVATED BY NATURAL THERMAL RADIATION COMPRISING: (A) AN ACQUISITION ANTENNA THE AXIS OF WHICH IS DIRECTED ALONG A PREDETERMINED PATH; (B) A REFERENCE ANTENNA DIRECTED TOWARD A SELECTED POINT IN THE ATMOSPHERE; (C) A WAVE ENERGY REFLECTING SURFACE DISPOSED IN SAID PREDETERMINED PATH OPPOSITE SAID ACQUISITION ANTENNA AND ORIENTED TO REFLECT RADIATION FROM SAID SELECTED POINT IN THE ATMOSPHERE ALONG SAID AXIS OF THE ACQUISITION ANTENNA TO THE ACQUISITION ANTENNA; AND (D) MEANS CONNECTING SAID REFERENCE ANTENNA AND SAID ACQUISITION ANTENNA TO AN ELECTRICAL SIGNAL AMPLITUDE RESPONSIVE COMPARISON CIRCUIT.
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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |