Patent US2489908A successfully refreshed from Google Patents.
US2489908A
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US
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Calibrator for field intensity recorders
Assignee: General Electric Co
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Filing: 1946-10-29
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Granted: 1949-11-29
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Expires: 1966-10-29
Abstract
No abstract record available.
Inventors
- 👤 Charles V Larrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:11
CPC Classifications
G; G01; G01R; G01R35/00; G01R35/005; G01R29/00; G01R29/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1781363A
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US1923916A
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US2323076A
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US2295629A
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US2399481A
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US2411553A
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US2398606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |