Patents by Inventor Donald F. Byrne

Donald F. Byrne 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).

  • Reverse-graded catalyst systems for hydrodemetalation and hydrodesulfurization
    Patent number: 4789462
    Abstract: We provide reverse-graded catalyst systems which are capable of removing metals and sulfur from a hydrocarbon feedstock. They comprise two or more catalyst layers in which at least two successive catalyst layers characterized as having decreasing desulfurization activity, and increasing average macropore diameter in the direction of hydrocarbon flow. We also disclose a process for using them.
    Type: Grant
    Filed: September 29, 1986
    Date of Patent: December 6, 1988
    Assignee: Chevron Research Company
    Inventors: Donald F. Byrne, David R. Johnson, John V. Heyse