Patent US3091733A successfully refreshed from Google Patents.
US3091733A
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Apparatus for detecting flaws in elongated magnetic structures
Assignee: ELECTRO CHEMICAL LAB CORP
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Filing: 1957-03-05
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Granted: 1963-05-28
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Expires: 1977-03-05
Abstract
No abstract record available.
Inventors
- 👤 Robert E Fearon
- 👤 Warren G Ownby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:54
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9013; G01N27/902; G01N27/9006; G01N27/9093
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN APPARATUS FOR TESTING MAGNETIC PIPE, THE COMBINATION COMPRISING A GENERALLY CIRCULAR SUPPORTING MEMBER MADE OF NON-MAGNETIC MATERIAL AND HAVING A GENERALLY U-SHAPED SLOT EXTENDING AROUND THE PERIPHERY THEREOF, A GENERALLY U-SHAPED LINING IN SAID SLOT , SAID LINING BEING MADE FROM A MAGNETIC MATERIAL, A PAIR OF AXIALLY SPACED, INSULATED COILS WOUND AROUND SAID MEMBER WITHING SAID SLOT, A THIRD COIL WOUND AROUND SAID MEMBER AND DISPOSED BETWEEN THE FIRST AND SECOND COILS, AND A SATURABLE MAG-
Claim 2
Dependent Claim
78 words
IN APPARATUS FOR TESTING MAGNETIC PIPE, THE COMBINATION COMPRISING A GENERALLY CIRCULAR SUPPORTING MEMBER MADE OF NON-MAGNETIC MATERIAL AND HAVING A GENERALLY U-SHAPED SLOT EXTENDING AROUND THE PERIPHERY THEREOF, A GENERALLY U-SHAPED LINING IN SAID SLOT , SAID LINING BEING MADE FROM A MAGNETIC MATERIAL, A PAIR OF AXIALLY SPACED, INSULATED COILS WOUND AROUND SAID MEMBER WITHING SAID SLOT, A THIRD COIL WOUND AROUND SAID MEMBER AND DISPOSED BETWEEN THE FIRST AND SECOND COILS, AND A SATURABLE MAG-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |