Patents by Inventor Peter A. Wieringa

Peter A. Wieringa 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).

  • Process for cracking hydrocarbon feeds
    Patent number: 4840724
    Abstract: There is disclosed a process for cracking a hydrocarbon feed in the presence of a fluidizable cracking catalyst composition containing a sepiolite, an ultrastable Y-zeolite and a matrix material, characterized in that the hydrocarbon feed is metal-free.
    Type: Grant
    Filed: January 12, 1989
    Date of Patent: June 20, 1989
    Assignee: Akzo NV
    Inventors: Cornelis J. Groenenboom, Peter A. Wieringa