Patents by Inventor Jürgen Szameitat

Jürgen Szameitat 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).

  • Isomeric nonanols and decanols, their preparation, phthalic esters obtained therefrom and their use as plasticizers
    Patent number: 6482972
    Abstract: Mixtures of isomeric nonanols and decanols are obtained by joint aldol condensation of n-butanal and pentanals, and up to 1% by weight of 3-methylbutanal, hydrogenation of the aldol condensation product to the corresponding saturated alcohols, and separation from the reaction mixture of the components boiling at temperatures lower than those of the nonanols and decanols. The pentanals are mixtures of 60 to 90% by weight of n-pentanal and 10 to 40% by weight of 2-methylbutanal. The alcohol mixture is especially suitable for preparing ester plasticizers.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: November 19, 2002
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Helmut Bahrmann, Wilfried Fenske, Wolfgang Greb, Peter Heymanns, Peter Lappe, Thomas Müller, Jürgen Szameitat, Ernst Wiebus