Patents by Inventor Theodor Grewer

Theodor Grewer 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 3-acylaminoanilines
    Patent number: 4552699
    Abstract: A process for the preparation of 3-acylaminoanilines of the general formula (1) ##STR1## in which R denotes a branched or unbranched alkyl radical having 1-7 carbon atoms or the phenyl group, which can be substituted by 1-2 methyl groups or by 1-2 chlorine atoms, which comprises reacting a carboxylic acid of the general formula (2)R--COOH (2)in which R has the meaning mentioned, with an excess of 1,3-diaminobenzene, and separating the reaction mixture by distillation.
    Type: Grant
    Filed: December 13, 1983
    Date of Patent: November 12, 1985
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Reinhard Hahnle, Theodor Grewer