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Patent US2970257A successfully refreshed from Google Patents.
US2970257A
Expired / Lapsed
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Coil tester
Assignee: RTX Corp
•
Filing: 1957-03-26
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Granted: 1961-01-31
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Expires: 1977-03-26
Abstract
No abstract record available.
Inventors
- 👤 Charles J Hanft
- 👤 Charles F Jaeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:54
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/50; G01R31/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23368E
Cited
US2047617A
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US2337132A
Cited
US2404238A
Cited
US2393717A
Cited
US2600396A
Cited
US2580670A
Cited
US2576173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |