US3560973A
Expired / Lapsed
US
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Method and apparatus for passive mapping
Assignee: IIT Research Institute
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Filing: 1968-02-29
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Granted: 1971-02-02
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Expires: 1988-02-29
Abstract
Abstract A METHOD AND APPARATUS IS DISCLOSED WHEREBY A NUMBER OF RADIATION EMITTERS MAY BE PRESSIVELY MAPPED BY MOVING A SENSOR MEANS HAVING A MULTILOBED RECEIVING PATTERN PAST THE EMITTERS SO THAT THE ENVELOPE OF THE SIGNAL RECEIVED THEREFROM FLUCTUATES IN ACCORDANCE WITH THE LOBE STRUCTURE OF THE PATTERN. THE RELATIVE TIME OF ARRIVAL OF THE SIGNAL IS DETERMINED TO PROVIDE AN INDICATION OF THE EMITTER AZIMUTH, AND THE RELATIVE ELONGATION OF THE RECEIVED SIGNAL IS DETERMINED TO PROVIDE AN INDICATION OF THE EMITTER RANGE.
Inventors
- 👤 Sidney Kazel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:01
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
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References Cited (Backward Citations)
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |