Patents by Inventor Johann Hanauer

Johann Hanauer 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).

  • Patent number: 4450116
    Abstract: 3-Alkoxypropylenimino-bis-(methylene phosphonic acids) of the formula ##STR1## wherein R is straight-chain or branched alkyl or alkenyl each having from 2 to 20, preferably 2 to 10, carbon atoms, aryl, preferably phenyl or aralkyl, preferably benzyl, and X is hydrogen, an alkali metal, alkaline earth metal, ammonium, alkylammonium or polyalkylenepolyammonium ion, preferably a sodium, potassium or ammonium ion, a process for their manufacture and their use as collector in the flotation of non-sulfidic ores.
    Type: Grant
    Filed: July 14, 1982
    Date of Patent: May 22, 1984
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Joachim Morawietz, Erich Hoffman, Johann Hanauer, Kurt Bauer