US3587298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic image color display system
Assignee: Northwestern University
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Filing: 1969-01-02
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Granted: 1971-06-28
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Expires: 1989-01-02
Abstract
Abstract AN ULTRASONIC TESTING SYSTEM INCLUDES A TRANSMITTING TRANSDUCER FOR BEAMING SONIC ENERGY THROUGH A TANK FILLED WITH A COUPLING MEDIUM TO A RECEIVING TRANSDUCER. THE RECEIVED SONIC ENERGY IS CONVERTED INTO AN ELECTRICAL SIGNAL WHICH IS THEN PHASE DEMODULATED INTO THREE PARTS ACCORDING TO THE PHASE OF THE RECEIVED SONIC ENERGY. EACH OF THESE THREE PARTS IS APPLIED TO A SEPARATE COLOR RELATED INPUT TERMINAL OF A COLOR TV RECEIVER. HENCE, THE IMAGE ON THE PICTURE TUBE IS DISPLAYED IN COLOR ACCORDING TO THE PHASE OF THE RECEIVED SIGNAL.
Inventors
- 👤 John E Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:28
CPC Classifications
G; G01; G01H; G01H3/00; G01H3/10; G01H3/12; G01H3/125; H; H01; H01J; H01J31/00; H01J31/08; H01J31/495
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |