US3538433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for discriminating between inside and outside defects using a combined leakage field and eddy current test system
Assignee: YUBOSCOPE Inc
•
Filing: 1968-07-15
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Granted: 1970-11-03
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Expires: 1988-07-15
Abstract
No abstract record available.
Inventors
- 👤 Fenton M Wood
- 👤 Alfred E Crouch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:15
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1946196A
Cited
US2729785A
Cited
US2744233A
Cited
US3271664A
Cited
US3340466A
Cited
US3343079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |