Patents by Inventor H. Douglas Woods

H. Douglas Woods 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).

  • Recovery of mercury
    Patent number: 4028236
    Abstract: Mercury present in liquid effluents, for example, the effluent from a caustic-chlorine plant using a flowing mercury cathode, is removed by first converting the mercury to a metallic or soluble form and thereafter contacting the solution with tin-coated iron strips having tin-iron interfaces in contact with the solution. The invention also is applicable to the recovery of mercury from existing accumulations in water body sediment.
    Type: Grant
    Filed: January 21, 1975
    Date of Patent: June 7, 1977
    Assignee: Ontario Research Foundation
    Inventors: Douglas W. Townsend, H. Douglas Woods