Patents by Inventor Johannes W. VAN DER Meer

Johannes W. VAN DER Meer 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
  • Feed line-pulsed gas injection
    Patent number: 4834588
    Abstract: The present invention is directed to an apparatus and method for minimizing mass flow rate fluctuations of a particulate solid fuel and gas mixture having a coal mass flow rate ranging from about 50-800 kg/m.sup.3 and a corresponding frequency range of about 0.1 to 100 Hertz transported to a reactor.
    Type: Grant
    Filed: September 18, 1987
    Date of Patent: May 30, 1989
    Assignee: Shell Oil Company
    Inventors: James A. Salter, Thomas S. DeWitz, Hendricus A. Dirkse, Johannes W. van der Meer
  • Feed line design
    Patent number: 4830545
    Abstract: The present invention is directed to an apparatus and method for minimizing mass flow rate fluctuations of a particulate solid fuel and gas mixture having a coal mixture mass flow rate of about 50-800 kg/cubic meter and a corresponding frequency range of about 0.1 to 100 Hertz to a reactor.
    Type: Grant
    Filed: September 18, 1987
    Date of Patent: May 16, 1989
    Assignee: Shell Oil Company
    Inventors: James A. Salter, Thomas S. Dewitz, Andrew M. Scott, Hendricus A. Dirkse, Johannes W. van der Meer
  • Mill/dryer gas temperature control
    Patent number: 4750434
    Abstract: A method and apparatus for controlling moisture content of a solid, such as pulverized coal, conveyed to a reactor, such as a gasifier, by controlling the temperature of a gas injected into a pulverizer or dryer based on the moisture content control of the coal transported to the gasifier.
    Type: Grant
    Filed: September 16, 1987
    Date of Patent: June 14, 1988
    Assignee: Shell Oil Company
    Inventors: James A. Salter, Thomas R. Schmidt, Frederik M. H. J. Duysings, Rudi Everts, David Brown, Johannes W. van der Meer
  • Preparation of 3-bromobenzaldehyde
    Patent number: 4036887
    Abstract: 3-Bromobenzaldehyde is prepared by treating benzaldehyde with bromine chloride in the presence of aluminum chloride and a solvent, under specified conditions.
    Type: Grant
    Filed: May 25, 1976
    Date of Patent: July 19, 1977
    Assignee: Shell Oil Company
    Inventors: Roger A. Sheldon, Johannes W. VAN DER Meer, Pieter A. Verbrugge, Albertus J. Mulder