Patents by Inventor Philip Edelstein

Philip Edelstein 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).

  • Use of cupric chloride in zinc flotation
    Patent number: 6484883
    Abstract: A process for activating a zinc-containing ore for flotation in aqueous media, wherein an ammonium-free aqueous cupric chloride solution is added to the media.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: November 26, 2002
    Assignee: Phibro-Tech Inc.
    Inventor: Philip Edelstein
  • Use of cupric chloride etchant solution in a solvent extraction electrowinning copper refinery
    Patent number: 6375713
    Abstract: Process for improving recovery of copper and reducing raw material costs, from a copper-containing source by SX-EW. The process comprises the steps of mixing an acidic copper-containing PLS obtained by leaching a copper-containing source with an acidic leachant, usually sulfuric acid, with an aqueous acidic cupric chloride solution spent printed wire board etchant, to produce an acidic cupric chloride/copper sulfate-containing mixture. This mixture is subjected to SX-EW to recover the copper as copper cathode.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: April 23, 2002
    Assignee: Phibrotech, Inc.
    Inventor: Philip Edelstein