Patents by Inventor Donna M. Van Duch

Donna M. Van Duch 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).

  • Chromium expanded smectite clay
    Patent number: 4452910
    Abstract: Expanded layer, smectite clay having a regular pore structure suitable for catalytic uses and a process for preparing said expanded clay by treating a suspension of commercial smectite clay with a chromium-oligomer solution and subjecting the treated clay to a stabilization heat treatment in an inert gas atmosphere.
    Type: Grant
    Filed: June 15, 1982
    Date of Patent: June 5, 1984
    Assignee: Standard Oil Company (Indiana)
    Inventors: P. Donald Hopkins, Bernard L. Meyers, Donna M. Van Duch