Patents by Inventor Karl-Heinz Rink

Karl-Heinz Rink 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 elimination of hydrogen sulfide or iron sulfide from an aqueous system
    Patent number: 4501668
    Abstract: There are employed water soluble low molecular weight polycondensation products produced by the condensation of acrolein and formaldehyde in a molar ratio between 1:1 and 1:10 in aqueous or aqueous-organic medium in the presence of a basic catalyst for the elimination of hydrogen sulfide and iron sulfide present in aqueous systems. The condensation reaction can also be carried out in the additional presence of water soluble monohydric or polyhydric alcohols and/or acid amides.
    Type: Grant
    Filed: December 6, 1983
    Date of Patent: February 26, 1985
    Assignee: Degussa Aktiengesellschaft
    Inventors: Wolfgang Merk, Karl-Heinz Rink
  • Use of polycondensation products from acrolein and formaldehyde as biocide
    Patent number: 4479820
    Abstract: There are employed as biocides for aqueous systems water soluble low molecular weight polycondensation products which are produced from acrolein and formaldehyde in the molar ratio between 1:1 and 1:10 in aqueous or aqueous-organic medium in the presence of a basic catalyst. The condensation reaction can also be carried out in the additional presence of water soluble mono- or polyhydric alcohols and/or acid amides.
    Type: Grant
    Filed: February 8, 1983
    Date of Patent: October 30, 1984
    Assignee: Degussa Akteingesellschaft
    Inventors: Wolfgang Merk, Karl-Heinz Rink