Patents Assigned to Nerco Inc.
  • Heterocyclic thione
    Patent number: 5342937
    Abstract: A solvent soluble heterocyclic o-hydroxy thione carrying a lipophilic group and the process for the selective extraction of gallium, and certain other related metals, especially from solutions containing excess aluminium.
    Type: Grant
    Filed: October 7, 1991
    Date of Patent: August 30, 1994
    Assignees: Zeneca, Limited, Nerco, Inc.
    Inventors: Peter W. Austin, Peter M. Quan, Peter A. Tasker, Derek Thorp
  • Heterocyclic thione
    Patent number: 5074911
    Abstract: A process for extracting metal values such as gallium and/or indium from aqueous solutions by contacting said solutions with a water immiscible organic solvent having dissolved therein a heterocyclic thione.
    Type: Grant
    Filed: June 26, 1990
    Date of Patent: December 24, 1991
    Assignees: Imperical Chemical Industries PLC, Nerco Inc.
    Inventors: Peter W. Austin, Peter M. Quan, Peter A. Tasker, Derek Thorp