Patents by Inventor Hartmut Ertel

Hartmut Ertel 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).

  • Cyano acetic acid anilide derivatives, process for their manufacture and compositions containing these compounds
    Patent number: 4061767
    Abstract: A 2-hydroxyethylidene-cyano acetic acid anilide is prepared by heating an acetoacetic acid anilide with an orthoformic acid ester and acetic anhydride, isolating the resulting 2-alkoxymethylene-acetoacetic acid anilide and treating it with hydroxylamine and the isoxazole so obtained with a base, and optionally reacting the resulting alkali metal or ammonium salt with a mineral acid or a strong organic acid. The compounds of the invention have anti-inflammatory and analgesic activity.
    Type: Grant
    Filed: June 3, 1976
    Date of Patent: December 6, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hartmut Ertel, Gunther Heubach, Erhard Wolf