Patents by Inventor John E. Vande Ven

John E. Vande Ven 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).

  • Catalyst sampling method
    Patent number: 3973440
    Abstract: Small representative samples of catalyst are removed from a fixed bed reactor through a withdrawal conduit and transferred into a sample receiver held at a lower pressure by quickly unsealing the withdrawal conduit and causing a small and sudden gas flow which fluidizes catalyst and lifts it into the withdrawal conduit, through which it falls by the action of gravity.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: August 10, 1976
    Assignee: Universal Oil Products Company
    Inventors: John E. Vande Ven, Steven M. Fischer