Patent US3242486A successfully refreshed from Google Patents.
US3242486A
Expired / Lapsed
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Intrusion detection system
Assignee: Johnson Controls International Inc
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Filing: 1962-04-20
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Granted: 1966-03-22
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Expires: 1982-04-20
Abstract
No abstract record available.
Inventors
- 👤 Paul I Corbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:48
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/52; G01S13/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
AN ALARM SYSTEM FOR DETECTING THE PRESENCE OF A MOVING BODY IN AN AREA, COMPRISING MEANS FOR RADIATING ENERGY INTO SAID AREA HAVING A FREQUENCY CHARACTERISTIC, MEANS FOR RECEIVING A PORTION OF SAID RADIATED ENERGY, MEANS FOR DETECTING THE PRESENCE OF CHANGES IN SAID FREQUENCY CHARACTERISTICS IN SAID RECEIVED ENERGY AND PROVIDING A SIGNAL OUTPUT IN RESPONSE TO SAID CHANGES RELATED IN FREQUENCY TO SAID CHANGES AND RELATED IN AMPLITUDE TO THE CONCURRENT FIELD STRENGTH OF SAID RECEIVED ENERGY HAVING SAID CHANGES, AND MEANS FOR DISCRIMINATING BETWEEN SIGNAL OUTPUTS HAVING AN AMPLITUDE IN EXCESS OF A GIVEN LEVEL AND THOSE HAVING AN AMPLITUDE LESS THAN SAID LEVEL AND PROVIDING A TRIGGER OUTPUT IN RESPONSE TO A SINGLE CYCLE OF SAID SIGNAL HAVING AN AMPLITUDE VALUE IN EXCESS OF SAID GIVEN LEVEL.
Claim 2
Dependent Claim
131 words
AN ALARM SYSTEM FOR DETECTING THE PRESENCE OF A MOVING BODY IN AN AREA, COMPRISING MEANS FOR RADIATING ENERGY INTO SAID AREA HAVING A FREQUENCY CHARACTERISTIC, MEANS FOR RECEIVING A PORTION OF SAID RADIATED ENERGY, MEANS FOR DETECTING THE PRESENCE OF CHANGES IN SAID FREQUENCY CHARACTERISTICS IN SAID RECEIVED ENERGY AND PROVIDING A SIGNAL OUTPUT IN RESPONSE TO SAID CHANGES RELATED IN FREQUENCY TO SAID CHANGES AND RELATED IN AMPLITUDE TO THE CONCURRENT FIELD STRENGTH OF SAID RECEIVED ENERGY HAVING SAID CHANGES, AND MEANS FOR DISCRIMINATING BETWEEN SIGNAL OUTPUTS HAVING AN AMPLITUDE IN EXCESS OF A GIVEN LEVEL AND THOSE HAVING AN AMPLITUDE LESS THAN SAID LEVEL AND PROVIDING A TRIGGER OUTPUT IN RESPONSE TO A SINGLE CYCLE OF SAID SIGNAL HAVING AN AMPLITUDE VALUE IN EXCESS OF SAID GIVEN LEVEL.
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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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |