Patent US2939071A successfully refreshed from Google Patents.
US2939071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil assembly for testing of rods or tubes
Assignee: Individual
•
Filing: 1957-08-07
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Granted: 1960-05-31
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Expires: 1977-08-07
Abstract
No abstract record available.
Inventors
- 👤 Friedrich M O Foerster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 23:18
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2065119A
Cited
US2102451A
Cited
US2237254A
Cited
US2489920A
Cited
US2550736A
Cited
US2673613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |