Patents by Inventor Gabriele Leukel

Gabriele Leukel 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 preparation of isocyanates and their use of the preparation of polyisocyanates containing ester groups
    Patent number: 4946990
    Abstract: This invention relates to a novel process for the preparation of isocyanates containing silylated alcoholic or phenolic hydroxyl groups as substituents and to the use of the compounds obtained by this process as reactants for isocyanatocarboxylic acid halide in the preparation of polyisocyanates containing ester groups.
    Type: Grant
    Filed: June 20, 1989
    Date of Patent: August 7, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Werner Mormann, Gabriele Leukel
  • Process for the preparation of isocyanates and their use for the preparation of polyisocyanates containing ester groups
    Patent number: 4886902
    Abstract: This invention relates to a novel process for the preparation of isocyanates containing silylated alcoholic or phenolic hydroxyl groups as substituents and to the use of the compounds obtained by this process as reactants for isocyanatocarboxylic acid halides in the preparation of polyisocyanates containing ester groups.
    Type: Grant
    Filed: June 20, 1989
    Date of Patent: December 12, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Werner Mormann, Gabriele Leukel
  • Process for the preparation of isocyanates and their use for the preparation of polyisocyanates containing ester
    Patent number: 4870198
    Abstract: This invention relates to a novel process for the preparation of isocyanates containing silylated alcoholic or phenolic hydroxyl groups as substituents and to the use of the compounds obtained by this process as reactants for isocyanatocarboxylic acid halides in the preparation of polyisocyanates containing ester groups.
    Type: Grant
    Filed: September 7, 1988
    Date of Patent: September 26, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Werner Mormann, Gabriele Leukel