US3497799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil apparatus and method for inducing eddy currents in a metallic object and detecting flaws in response to a change in impedance load
Assignee: Republic Steel Corp
•
Filing: 1965-06-10
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Granted: 1970-02-24
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Expires: 1985-06-10
Abstract
No abstract record available.
Inventors
- 👤 William C Harmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:57
CPC Classifications
G; G01; G01N; G01N22/00; G01N22/02; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9006; G01N27/9046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2998566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |