Patents Assigned to McKenchnie Chemicals Limited
  • Controlled release of trace elements
    Patent number: 4447254
    Abstract: A composition for providing a substantially controlled level of dissolved trace element in water comprises a trace element compound in a relatively insoluble form. Preferably the composition comprises a relatively insoluble trace element compound and a binder which results in the composition having a different solubility product to that of the trace element alone. The binder may be plaster of paris.
    Type: Grant
    Filed: July 22, 1981
    Date of Patent: May 8, 1984
    Assignee: McKenchnie Chemicals Limited
    Inventors: Alan C. Hughes, Richard C. Copeman, Thomas N. R. Marples