Patents by Inventor Edith Hissmann

Edith Hissmann 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 production of isocyanates
    Patent number: 4745212
    Abstract: Isocyanates containing ester and/or amide groups are produced by reacting (a) an isocyanatocarboxylic acid chloride with (b) an organic compound containing a silylated alcoholic group and/or silylated phenolic hydroxyl group and/or silylated amino group which compound contains no other group which is reactive with isocyanate and chlorocarbonyl groups under the reaction conditions. The reaction of (a) with (b) is carried out at a temperature of from -20.degree. to 150.degree. C. This process makes it possible to produce the desired isocyanates with a high degree of selectivity.
    Type: Grant
    Filed: October 8, 1987
    Date of Patent: May 17, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Werner Mormann, Edith Hissmann