US3610028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic flaw detector
Assignee: Hitachi Ltd
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Filing: 1969-07-17
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Granted: 1971-10-05
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Expires: 1989-07-17
Abstract
Abstract AN ULTRASONIC FLAW DETECTOR IN WHICH AN ULTRASONIC BEAM IS DIRECTED ONTO THE SURFACE OF AN OBJECT THROUGH AN ULTRASONIC WAVE TRANSMISSION MEDIUM AT AN ANGLE OF INCIDENCE SATISFYING THE CONDITION OF TOTAL REFLECTION AND THE ULTRASONIC WAVE SENSING SECTITON FOR SENSING THE ECHO COMING FROM THE SURFACE OF THE OBJECT IS SO SIZED AS TO MEET A PREDETERMINED CONDITION THEREBY TO DETECT A FLAW WITH HIGH SENSITIVITY.
Inventors
- 👤 Soji Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:44
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/041; G01N2291/00; G01N2291/04; G01N2291/042; G01N2291/0423
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |