Patents by Inventor Henricus C. J. Venselaar

Henricus C. J. Venselaar 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).

  • Pressure compensated weigh system
    Patent number: 4838738
    Abstract: The present invention is directed to an apparatus and method for controlling mass flow rate of a particulate solids and gas mixture to a reactor. In particular, the fast response of a mass flow rate-indicating device is combined with the longer term accuracies in changes in the total mass from weigh cells to yield rapid and more accurate loss-in-weight measurements than conventional systems.
    Type: Grant
    Filed: October 28, 1987
    Date of Patent: June 13, 1989
    Assignee: Shell Oil Company
    Inventors: James A. Salter, Thomas R. Schmidt, Thomas S. DeWitz, Charles M. Arbore, Frederick M. H. J. Duysings, Johannes W. Van Der Meer, David Brown, Henricus C. J. Venselaar