Method and apparatus for measuring effectiveness of a corrosion inhibitor
Patent 4266187 Issued on May 5, 1981. Estimated Expiration Date: 
April 23, 1999. 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.
April 23, 1999. 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 2824283 3047847 3406101 3609549 3757210 3909709 InventorApplicationNo. 06/032598 filed on 04/23/1979US Classes:205/776.5, Of coating, coated substrate, or imbedded object324/442, Which includes an oscillator324/449, With axially arranged electrodes324/71.2, Erosion324/713With voltage or current signal evaluationExaminersPrimary: Krawczewicz, Stanley T.Attorney, Agent or FirmInternational ClassesG01R 27/02 (20060101)G01R 27/14 (20060101) AbstractA simple, low cost test instrument for measuring effectiveness of a corrosion inhibiting film. It employs solid state integrated circuits and applies an AC signal across the film. The amplitude of the signal is less than that which would damage the film, and the electrical resistance is a measure of the inhibitor effectiveness. |
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