Patents by Inventor Raymond Wiedmeyer

Raymond Wiedmeyer 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).

  • Device for the removal and concentration of ionic metal species from water
    Patent number: 6296760
    Abstract: A device is provided for capturing ionic metal species (e.g., Cd, Cu, Ni, Pb and Zn) dissolved in water. The device includes a nonporous polymeric tube for capturing the dissolved ionic metal species. The tube is formed from a membrane having transient cavities therein having an average pore size greater than 10 Å. A sequestration medium, contained within the tube, transforms the ionic metal species captured by the tube into a complexed, non-mobile metal species. The sequestration medium is capable of diffusing through the nonporous polymeric membrane at a controlled rate to form the complexed, non-mobile species and can comprise a mixture and metal complexing agent (e.g., a quinoline) and a long chain organic acid (e.g., oleic acid).
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: October 2, 2001
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Jimmie D. Petty, William G. Brumbaugh, James N. Huckins, Thomas W. May, Raymond Wiedmeyer