Patents by Inventor Kurt Eitel

Kurt Eitel 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).

  • Iron complex azo dyestuffs
    Patent number: 4256634
    Abstract: Iron complexes of azo dyestuffs of the formula ##STR1## wherein R.sub.1 and R.sub.2 have the meaning indicated in the description,and their use for dyeing or printing various fibre materials, for example wool, silk and synthetic materials such as Perlon, but especially leather. The dyeings obtained are distinguished by good fastness properties.
    Type: Grant
    Filed: February 16, 1979
    Date of Patent: March 17, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hermann Goebel, Kurt Eitel