Patents by Inventor Struan Robertson

Struan Robertson 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).

  • Apparatus for the recovery and destruction of toxins from contaminated soils
    Patent number: 5078868
    Abstract: A method and apparatus for cleansing contaminated soil (11), the apparatus includes an extraction vessel (12) into which contaminated soil (11) is delivered together with a solvent. A slurry is produced which is delivered to a settler (18) which produces a settler underflow and contaminated solvent. The settler (18) underflow is delivered to a drier (23). The contaminated solvent passes through a filter (20) which produces a filter cake also delivered to the drier (23). The contaminated solvent passes through a distillation column (28) and is subsequently delivered to a plasma gun (35) whereat the contaminants are oxidized.
    Type: Grant
    Filed: April 11, 1990
    Date of Patent: January 7, 1992
    Assignee: Zenata N.V.
    Inventor: Struan Robertson