Patents by Inventor Leonardus H. Postma

Leonardus H. Postma 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 the hydrogenation of phenyl acetylene in a styrene-containing medium with the aid of a catalyst
    Patent number: 6747181
    Abstract: The invention relates to a process for the hydrogenation of phenyl acetylene in a styrene-containing medium with the aid of a supported nickel catalyst with a nickel content of 10-25 wt. %. This process is by preference used for the hydrogenation of phenyl acetylene in a styrene-containing medium which contains more that 30 wt. % of styrene.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: June 8, 2004
    Assignee: DSM N.V.
    Inventors: Hubertus J. M. Bosman, Edwin J. Grootendorst, Leonardus H. Postma, Theodorus M. Smeets