Manganese dioxide electrodes
Patent 4072586 Issued on February 7, 1978. Estimated Expiration Date: 
February 7, 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.
February 7, 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 3491014 3562008 3616302 3632498 3663280 3775284 3855084 3878083 Insoluble electrode for electrolysis Patent #: 3977958 InventorsApplicationNo. 05/681280 filed on 04/28/1976US Classes:205/576, Specified anode204/290.12, Refractory metal (i.e., Ti, V, Cr, Zr, Nb or Cb, Mo, Hf, Ta, or W) or compound containing204/291, Composition205/578, Lead containing205/579, Iron, cobalt, or nickel containing205/588, Specified anode other than consumable iron, cobalt, or nickel containing205/603Utilizing specified electrode other than consumable zinc containing electrodeExaminersPrimary: Edmundson, F.C.Attorney, Agent or FirmForeign Application Priority Data1975-12-17 ITAbstractNovel electrodes consisting essentially of a valve metal base or other electrically conductive material which is corrosion-resistant to the anodic conditions having on at least a portion of its outer surface an electrocatalytic coating of ଲ-manganese dioxide chemi-deposited by thermal decomposition of an alcoholic solution of manganese nitrate which are useful in electrolysis processes in which oxygen is formed at the anode such as electrowinning of metals from sulfuric acid solution or in the electrolytic production of perchlorates. Also included are electrodes where the ଲ-manganese dioxide coating is activated by doping with up to 5% by weight of at least one metal of the groups IB, IIB, IVA, VA, VB, VIB, VIIB, and VIII of the Periodic Table excluding the platinum group metals, gold and silver or activated by irradiation of the ଲ-manganese dioxide coating and/or stabilized by the addition of up to 20% by weight of silicon dioxide, tin dioxide or ଲ-lead dioxide as a mechanical stabilizer for the coating.Field of SearchComposition |
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