Patents by Inventor Kurt Kummerle

Kurt Kummerle 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 benzimidazolone-(2)
    Patent number: 4269989
    Abstract: Benzimidazolone-(2) is obtained in good yield and high purity when o-phenylene diamine is condensed with urea in water at a pH of 4 to 9 and a temperature above 90.degree. C.
    Type: Grant
    Filed: December 19, 1979
    Date of Patent: May 26, 1981
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hartmut Heise, Ernst Hille, Reinhard Wagner, Kurt Kummerle
  • Process for the manufacture of 3-hydroxybutyric acid arylamides with trialkyl phosphate and substituted phosphine promotor
    Patent number: 4128578
    Abstract: The liquid-phase catalytic hydrogenation of N-acetoacetyl arylamides to yield 3-hydroxybutyric acid arylamides proceeds much faster when amines, phosphines or trialkylphosphates are added. Thus, even with lower hydrogen pressures and at lower temperatures with a lower catalyst concentration, shorter reaction times are sufficient.
    Type: Grant
    Filed: March 8, 1977
    Date of Patent: December 5, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Kurt Kummerle, Hartmut Heise, Ernst Hille