US2647236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical circuit for measuring the ratio of two potentials
Assignee: Dow Chemical Co
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Filing: 1948-05-20
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Granted: 1953-07-28
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Expires: 1968-05-20
Abstract
No abstract record available.
Inventors
- 👤 Jason L Saunderson
- 👤 Victor J Caldecourt
- 👤 Eugene W Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:24
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/24; G01; G01R; G01R27/00; G01R27/02; G01R27/08; G01R27/10; G01R27/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |