Patents by Inventor K. Robert Mueller

K. Robert Mueller 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).

  • Treatment and disposal of wastewaters containing carbon black and ash
    Patent number: 4728437
    Abstract: Wastewaters which contain carbon black and ash and originate from high temperature processes and in which the carbon black is present in a very finely divided state and partially in a colloidal state are treated and disposed of by a process in which the wastewater is treated with calcium carbonate or calcium hydroxide and an organic flocculant and subjected to a two-stage filtration and the resulting filter cake containing carbon black and ash is subjected to an aftertreatment with an aqueous iron salt solution.
    Type: Grant
    Filed: August 8, 1986
    Date of Patent: March 1, 1988
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Gettert, Knut Kaempfer, Bruno Sander, Siegfried Marquardt, K. Robert Mueller