Analytical apparatus
Patent 4066528 Issued on January 3, 1978. Estimated Expiration Date: 
January 3, 1995. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 3, 1995. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2886496 3341430 3441490 3563875 3647668 InventorAssigneeApplicationNo. 05/706555 filed on 07/19/1976US Classes:204/405, Titration204/406With significant electrical circuitry or nominal computer deviceExaminersPrimary: Tung, T.Attorney, Agent or FirmInternational ClassG01N 27/42 (20060101)Foreign Application Priority Data1975-07-30 UKAbstractApparatus for coulometry comprises (a) an instrumentation amplifier acting as a differential to single-ended potential convertor having high input impedence, (b) means for feeding (a) with the potential between the sensor and reference electrodes of a coulometric cell and (c) and differential potential input amplifier fed by (a) and by means for setting the output of (c) to zero, the phase shift of the apparatus being less than 90°. |
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