Patents by Inventor Charles M. Hancher

Charles M. Hancher 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 removing metals from water
    Patent number: 4814091
    Abstract: A process for removing metals from water including the steps of prefiltering solids from the water, adjusting the pH to between about 2 and 3, reducing the amount of dissolved oxygen in the water, increasing the pH to between about 6 and 8, adding water-soluble sulfide to precipitate insoluble sulfide- and hydroxide-forming metals, adding a flocculating agent, separating precipitate-containing floc, and postfiltering the resultant solution. The postfiltered solution may optionally be eluted through an ion exchange resin to remove residual metal ions.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: March 21, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: John M. Napier, Charles M. Hancher, Gail D. Hackett