Patents by Inventor John W. Kress

John W. Kress 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).

  • Preparation of molecular sieve catalysts micro-filtration
    Patent number: 6521562
    Abstract: A method of making a molecular sieve catalyst by preparing a catalyst slurry containing molecular sieve, binder and a matrix material and directing the slurry to a forming unit. The catalyst slurry is prepared by using a microfiltration process whereby the molecular sieve is washed and concentrated from a preparation medium without having to isolate the molecular sieve in a dry or semi-dry form. The catalyst is used to make ethylene and propylene from an oxygenate.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: February 18, 2003
    Assignee: ExxonMobil Chemical Patents, Inc.
    Inventors: Kenneth R. Clem, Luc R. M. Martens, Stephen N. Vaughn, Paul R. Stafford, John W. Kress, Machteld M. Mertens