Patent US3531990A successfully refreshed from Google Patents.
US3531990A
Expired / Lapsed
US
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Wheatstone bridge for making precise temperature measurements
Assignee: Schneider Electric Systems USA Inc
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Filing: 1966-11-14
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Granted: 1970-10-06
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Expires: 1986-11-14
Abstract
No abstract record available.
Inventors
- 👤 Francis G Shinskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:59
CPC Classifications
G; G01; G01K; G01K3/00; G01K3/08; G01K3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1099199A
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US2249751A
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US2676489A
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US2976729A
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US3067613A
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US3161821A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |