Patent US1912445A successfully refreshed from Google Patents.
Patent US2650344A successfully refreshed from Google Patents.
US2650344A
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Magnetic testing apparatus
Assignee: Tuboscope Co
•
Filing: 1949-03-22
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Granted: 1953-08-25
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Expires: 1969-03-22
Abstract
No abstract record available.
Inventors
- 👤 Lloyd Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:44
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9093
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US213197A
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US890085A
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US2067804A
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US1782462A
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US2185589A
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US2124579A
Cited
US2218784A
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US2217733A
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US2220881A
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US2359894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |