Patents by Inventor Raymond T. Pettyjohn

Raymond T. Pettyjohn 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).

  • De-watering process
    Patent number: 6805802
    Abstract: Process muds are de-watered by the addition of high clay alumina. The clay is mixed with plant sludges or muds so as to cause flocculation of the solid particles, and separating the water from the solid materials, as by filtration. Various polymers and/or alum process residues can be added as well. In addition to de-watering plant sludges, this method also reduces color, and reduces the total organic carbon as well as heavy metals, from the filtered water. This permits disposal of the water to public waterways with no additional treatment.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: October 19, 2004
    Assignee: General Chemical Corporation
    Inventors: Christopher Bruce Lind, Raymond T. Pettyjohn
  • De-watering process
    Publication number: 20030189007
    Abstract: Process muds are de-watered by the addition of high clay alumina. The clay is mixed with plant sludges or muds so as to cause flocculation of the solid particles, and separating the water from the solid materials, as by filtration. Various polymers and/or alum process residues can be added as well. In addition to de-watering plant sludges, this method also reduces color, and reduces the total organic carbon as well as heavy metals, from the filtered water. This permits disposal of the water to public waterways with no additional treatment.
    Type: Application
    Filed: July 25, 2002
    Publication date: October 9, 2003
    Inventors: Christopher Bruce Lind, Raymond T. Pettyjohn