Patents by Inventor Dirk Christoffel Benade

Dirk Christoffel Benade 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).

  • Removal of solid contaminants from tar and tar-like products
    Patent number: 3992281
    Abstract: A method of separating tar from solid contaminant including the steps of dissolving the tar in a compatible solvent; and separating dissolved tar from solid material. Preferably, contaminated tar is caused to flow in a stream; solvent is introduced into the stream of contaminated tar; the contaminated tar and the solvent are caused to flow together a predetermined distance to permit dissolution of tar; and a diluted tar fraction is separated from a solid contaminant fraction.
    Type: Grant
    Filed: February 27, 1975
    Date of Patent: November 16, 1976
    Assignee: South African Coal, Oil & Gas Corporation Limited
    Inventor: Dirk Christoffel Benade