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US2626308A
Expired / Lapsed
US
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Method of magnetic investigation
Assignee: Individual
•
Filing: 1944-08-07
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Granted: 1953-01-20
•
Expires: 1964-08-07
Abstract
No abstract record available.
Inventors
- 👤 Otto H Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:03
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/12; G06; G06G; G06G7/00; G06G7/48; G06G7/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1297929A
Cited
US1461492A
Cited
US1672328A
Cited
US1819798A
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US2149717A
Cited
US2266358A
Cited
US2412617A
Cited
US2428155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-20 | 1956-07-21 | 1957-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-20 | 1960-07-21 | 1961-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-20 | 1964-07-21 | 1965-01-20 | $7700.00 | Window Closed / Lapsed |