Patents by Inventor Cornelius du Plessis

Cornelius du Plessis 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 and process for activation and reactivation of carbon by electrical resistance heating in the presence of steam
    Patent number: 5406582
    Abstract: An apparatus and process for the activation or reactivation of carbon in a tubular reactor that consists of two or more sequential sections, each section containing a descending column of carbon, with inlets to introduce steam into any one or more of the sections, and wherein the electric current is fed into the column of carbon of each such section via a graphite block serving as an electrode and positioned at the center of the top of the column by attachment to a steel plate that includes a flat or a V-shaped shelf and that is provided with openings to allow the released gases and vapors to escape.
    Type: Grant
    Filed: August 3, 1993
    Date of Patent: April 11, 1995
    Inventor: Cornelius du Plessis