Patents by Inventor Herbert Landgraber

Herbert Landgraber 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).

  • Sodium tripolyphosphate, process for making it, and its use
    Patent number: 4454054
    Abstract: The disclosure relates to sodium tripolyphosphate containing up to 95 weight % phase-I, 0.1 to 22 weight % water of crystallization and 0.01 to 2.0 weight %, calculated as metal, of a compound of the metals selected from calcium, magnesium, zinc or strontium, the compound yielding ions in an aqueous medium. The disclosure also relates to a process for making the tripolyphosphate, and to its uses.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: June 12, 1984
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Herbert Landgraber, Werner Kowalski, Johan Scheffer, Hans Haas