Patents by Inventor Herbert Nordt, deceased

Herbert Nordt, deceased 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 optionally substituted cinnamic acid in the presence of a catalyst
    Patent number: 4609756
    Abstract: In the preparation of a cinnamic acid by reacting the corresponding benzaldehyde with ketene in the presence of a catalyst, the improvement which comprises using as the catalyst an iron and/or zinc salt of a mono- or di-carboxylic acid with 2 to 20 carbon atoms containing free carboxylic acid and/or anhydride, and then splitting the reaction product in the temperature range from 100.degree. to 250.degree. C. with an acid or basic catalyst.
    Type: Grant
    Filed: October 4, 1985
    Date of Patent: September 2, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Alfons Dorlars, Heinz U. Blank, Herbert Nordt, deceased, Viktor Trescher