Patent US3492564A successfully refreshed from Google Patents.
US3492564A
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Metal body locator including two similar,functionally variable frequency oscillators,two search coils and cross-coupling means
Assignee: LESLIE H BAKER JR
•
Filing: 1968-01-22
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Granted: 1970-01-27
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Expires: 1988-01-22
Abstract
No abstract record available.
Inventors
- 👤 Leslie H Baker Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:37
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2398800A
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US2321356A
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US2451596A
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US2442805A
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US2447316A
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US3259837A
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US3327203A
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US3355658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |