Patent US3555499A successfully refreshed from Google Patents.
US3555499A
Expired / Lapsed
US
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Method and system for determining reflectivity of the ocean bottom
Assignee: Texas Instruments Inc
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Filing: 1968-05-24
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Granted: 1971-01-12
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Expires: 1988-05-24
Abstract
Abstract THE BOTTOM LOSS OF A SONAR SIGNAL REFLECTED FROM THE OCEAN BOTTOM IS DETERMINED BY GENERATING VOLTAGES PROPORTIONAL TO THE MAGNITUDE OF SIGNALS TRNSMITTED TO THE OCEAN BOTTOM, THE AMPLITUDE OF SONAR ECHO FROM THE OCEAN BOTTOM, THE GAINS AND SENSITIVITIES OF THE SONAR CIRCUITRY, AND THE DEPTH AND ABSORPTION CHARACTERISTICS OF THE OCEAN. THESE GENERATED VOLTAGES AREOPERATED UPON ACCORDING TO A PRESELECTED FUNCTION IN ORDER TO GENERATE AN OUTPUT SIGNAL REPRESENTATIVE OF THE BOTTOM LOSS OF THE SONAR SIGNAL. BOTTOM TRACKING OF THE OCEAN BOTTOM IS ALSO UTILIZED TO ELIMINATE ERRORS CAUSED BY REFLECTIONS OTHER THAN THE ACTUAL OCEAN BOTTOM.
Inventors
- 👤 Frank H Macdonald
- 👤 Charles R Key
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:48
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/52; G01S7/523; G01S7/526; G01S7/529; G01S15/00; G01S15/02; G01S15/06; G01S15/08; G01S15/10; G01S15/18; G01V; G01V1/00; G01V1/38; G01V1/3808; Y; Y10; Y10S; Y10S367/00; Y10S367/901
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |