Patents by Inventor Dirk Jan Koot

Dirk Jan Koot 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).

  • Process for the aerobic biological purification of water
    Patent number: 5985150
    Abstract: The invention is directed to a process for the aerobic purification of waste water in a reactor containing unsupported granular active sludge. The oxygen necessary for maintaining aerobic conditions within the reactor is provided in the form of an oxygen-containing gas. The oxygen-containing gas is preferably introduced into the reactor at such a place that the oxygen-containing gas provides at least some mixing action in the reactor. The invention also provides a reactor suitable for this process.
    Type: Grant
    Filed: April 15, 1996
    Date of Patent: November 16, 1999
    Assignee: Biothane Systems International B.V.
    Inventors: Abraham Izaak Versprille, Dirk Jan Koot