Patents by Inventor Graeme Medworth

Graeme Medworth 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).

  • Underdrain structure for media filters
    Patent number: 5976370
    Abstract: An underdrain for a media filter used to filter liquids. The media particles rest on a pair of perforated plates having offset perforations. The plates are spaced apart a distance less than the size of the media particles. This allows the filtered liquid to flow through the plates but blocks passage of the media particles through the plates.
    Type: Grant
    Filed: July 7, 1997
    Date of Patent: November 2, 1999
    Assignee: Westech Engineering, Inc.
    Inventor: Graeme Medworth