US3559058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compensated electrical measuring instrument
Assignee: Camille Bauer Messinstrumente AG
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Filing: 1968-07-15
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Granted: 1971-01-26
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Expires: 1988-07-15
Abstract
Abstract AN ELECTRICAL MEASURING INSTRUMENT WHEREIN A CHANGE IN INPUT QUANTITY IS COMPENSATED BY A CORRESPONDING CHANGE IN FEEDBACK FROM AN OUTPUT. INTERCONNECTED CAPACITORS WHOSE CAPACITANCE IS DEPENDENT ON VOLTAGE HAVE THEIR CAPACITY ALTERED BY CHANGE OF INPUT AND THE ALTERED CAPACITIES ARE BALANCED BY VARYING THE RELATIVE CAPACITANCES OF A VARIABLE DIFFERENTIAL CAPACITOR, THE EXTENT OF VARIATION TO PRODUCE BALANCE BEING A MEASURE OF THE OUTPUT.
Inventors
- 👤 Ludwig Ludin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:23
CPC Classifications
G; G01; G01R; G01R19/00; G01R17/00; G01R17/02; G01R17/06; G01R19/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |