Patents by Inventor Robert William Gibson

Robert William Gibson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the recovery of tin, tin alloys or lead alloys from printed circuit boards
    Patent number: 6641712
    Abstract: A method for selective dissolution of tin and/or lead- or tin-containing alloys from printed circuit boards is provided comprising contacting a printed circuit board with a solution comprising Ti(IV) and an acid which forms stable and soluble salt of Ti(III), Ti(IV), Sn(II) and Pb(II), under conditions to effect dissolution of substantially all of the Sn and/or Pb- or Sn-containing alloy therefrom, as Sn(II) and/or Pb(II) and recovering from the solution by electrolytic reduction substantially all of the Sn(II) and/or PB(II) species as Sn and/or Pb. After the electrolytic reduction step, the oxidant metal species is regenerated by oxidation and recycled to the first stage of the process.
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: November 4, 2003
    Assignee: Alpha Fry Limited
    Inventors: Robert William Gibson, Paul David Goodman, Lyn Holt, Ian McCrady Dalrymple, Derek John Fray