Patent US2638491A successfully refreshed from Google Patents.
US2638491A
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US
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Microcoulometer
Assignee: Consolidated Engineering Co Inc
•
Filing: 1949-09-19
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Granted: 1953-05-12
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Expires: 1969-09-19
Abstract
No abstract record available.
Inventors
- 👤 George K Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:16
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1995890A
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US2250202A
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US2405843A
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US2374248A
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US2404001A
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US2420590A
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US2483126A
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US2481112A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |