Patent US3553698A successfully refreshed from Google Patents.
US3553698A
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US
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Electronic locating and finding apparatus
Assignee: Cubic Corp
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Filing: 1968-12-23
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Granted: 1971-01-05
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Expires: 1988-12-23
Abstract
Abstract APPARATUS FOR ENABLING A VEHICLE TO LOCATE AND "HOME" UPON A REMOTE RADIATION SOURCE. TWO PAIRS OF ANTENNAS ON THE VEHICLE PROVIDE A UNIQUE SIGNAL WHEN THE VEHICLE IS ON A VECTOR TO THE SOURCE. A THIRD ANTENNA PAIR CAN BE USED, IN COMBINATION WITH ON-BOARD NAVIGATIONAL EQUIPMENT, TO SIGNAL WHEN THE VEHICLE IS VERTICALLY ALIGNED WITH THE SOURCE.
Inventors
- 👤 Richard W H Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:18
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/02; G01S3/14; G01S3/46; G01S3/48; H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/26; H01Q9/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |