Patents by Inventor Erich Haack

Erich Haack 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).

  • Benzene-sulfonyl semicarbazides and process for preparing them
    Patent number: 4066639
    Abstract: A benzene-sulfonyl semicarbazide of the formula ##STR1## wherein R is such as phenyl and substituted phenyl, cyclohexyl or alkyl, Y is -CH.sub.2 CH.sub.2 - or ##STR2## is alkylene-imino of 3 to carbon atoms which may also be substituted; a representative compound is 4-[4-(.beta.-<2-methoxy-5-chloro-benzamido->-ethyl)-benzene-sulfonyl]-1,1- (.gamma.,.gamma.-dimethyl-pentamethylene)-semicarbazide.
    Type: Grant
    Filed: January 24, 1975
    Date of Patent: January 3, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Helmut Weber, Karl Muth, Rudi Weyer, Walter Aumuller, Erich Haack