Patents by Inventor Stephen I. Kohut

Stephen I. Kohut 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 making copper foil
    Patent number: 5366612
    Abstract: The present invention relates to a process for making copper foil from copper-bearing material comprising:(A) contacting said copper-bearing material with an effective amount of at least one aqueous leaching solution to dissolve copper ions into said leaching solution and form a copper-rich aqueous leaching solution;(B) contacting said copper-rich aqueous leaching solution with an effective amount of at least one water-insoluble extractant to transfer copper ions from said copper-rich aqueous leaching solution to said extractant to form a copper-rich extractant and a copper-depleted aqueous leaching solution;(C) separating said copper-rich extractant from said copper-depleted aqueous leaching solution;(D) contacting said copper-rich extractant with an effective amount of at least one aqueous stripping solution to transfer copper ions from said extractant to said stripping solution to form a copper-rich stripping solution and a copper-depleted extractant;(E) separating said copper-rich stripping solution from
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: November 22, 1994
    Assignees: Magma Copper Company, Gould Electronics Inc.
    Inventors: Sidney J. Clouser, Michael A. Eamon, Thomas L. Jordan, Stephen I. Kohut