Patents by Inventor Robert J. Zoetemeyer

Robert J. Zoetemeyer 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).

  • Fluidized-bed apparatus
    Patent number: 5230794
    Abstract: The invention relates to a three phase separator which comprises a compartment for the substantial separation of the gas-phase, this compartment being equipped with at least one partition which is applied for an internal gaslift circulation.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: July 27, 1993
    Assignee: Biothane Corporation
    Inventors: Joseph J. Heijnen, Wilhelmus A. A. Koevoets, Robert J. Zoetemeyer
  • Fluidized bed process
    Patent number: 5116505
    Abstract: The present invention relates to a process for the anaerobic purification of waste water which comprises a fluidized-bed process in which granular sludge is applied.Moreover apparatus is disclosed for the purification of waste water using a fluidized-bed reactor wherein a liquid introduction device is present which is formed by one or more separate inlet pipes, the pipes delivering the liquid near the bottom of the reactor with an outlet velocity of 0.5-4 m/s, preferably 1-2 m/s.
    Type: Grant
    Filed: December 13, 1990
    Date of Patent: May 26, 1992
    Assignee: Gist-Brocades N.V.
    Inventors: Pieter A. Lourens, Robert J. Zoetemeyer