Patent US3552190A successfully refreshed from Google Patents.
US3552190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic testing system for elongated objects
Assignee: Magnaflux Corp
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Filing: 1967-07-11
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Granted: 1971-01-05
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Expires: 1987-07-11
Abstract
Abstract TESTING APPARATUS IN WHICH ENERGY IS TRANSMITTED ALONG AN ELONGATED OBJECT TO BE REFLECTED BY INHOMOGENEITIES TRANSVERSELY OUT OF THE OBJECT TO RECEIVING MEANS. PREFERABLY, ULTRASONIC ENERGY IS TRANSMITTED INTO THE OBJECT AT AN ANGLE SUCH THAT IT IMPINGES UPON SUBSTANTIALLY THE ENTIRE CROSS-SECTION AND MOST PREFERABLY, THE ANGLE IS SUCH THAT THE ENERGY TRAVELS IN A GENERALLY HELICAL PATH. THE RECEIVING MEANS COMPRISES EITHER A PLURALITY OF TRANSDUCERS IN ANGULARLY SPACED RELATION AROUND THE OBJECT, OR A CYLINDRICAL TRANSDUCER ENCIRCLING THE OBJECT.
Inventors
- 👤 Bernard J Lefebvre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:20
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/22; G01N29/26; G01N29/27
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 |