Patents by Inventor Ulrich Jersak

Ulrich Jersak 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).

  • Manufacture of substituted halobenzenes
    Patent number: 4172098
    Abstract: Halobenzenes are manufactured by (a) a one-vessel reaction of anilines with halogenating agents to give haloanilines, followed by reaction of the mixture thus obtained with alkanols and nitrosylating agents in the presence of water and acid at not less than 35.degree. C. or (b) the corresponding reaction of a haloaniline which has been manufactured in the above manner or by some other method and has been isolated from its reaction mixture. The products are starting materials for the manufacture of drugs, dyes and pesticides.
    Type: Grant
    Filed: November 15, 1977
    Date of Patent: October 23, 1979
    Assignee: BASF Aktiengesellschaft
    Inventors: Horst Scheuermann, Ulrich Jersak, Helmut Gorth
  • Manufacture of halonitrobenzenes
    Patent number: 4053527
    Abstract: Halonitrobenzenes are manufactured by reacting halonitroanilines with alkanols and nitrosating agents in the presence of water and an acid at not less than 35.degree. C. The products are starting materials for the manufacture of pharmaceuticals, dyes and pesticides.
    Type: Grant
    Filed: February 25, 1977
    Date of Patent: October 11, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Ulrich Jersak, Horst Scheuermann