Patents by Inventor August Horsthemke

August Horsthemke 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 continuous, counter flow/direct flow extraction of polyamides
    Patent number: 4978743
    Abstract: This invention relates to a process for the continuous extraction of polyamides, in which the residue of low molecular weight components left in the polyamide is very small. It also relates to a two-part extraction tube suitable for this purpose, in which the upper part is connected to the lower part by a transition tube of smaller diameter and a counterflow extraction is carried out in the upper part and a direct flow extraction in the lower part under particular conditions.
    Type: Grant
    Filed: September 19, 1988
    Date of Patent: December 18, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Harald Selbeck, August Horsthemke, August Bockmann, Frank Weber
  • Process for the isolation of thermoplastic polycarbonate from solution with vapor of benzene or alkylbenzene
    Patent number: 4631338
    Abstract: The present invention relates to the isolation of thermoplastic polycarbonates from their solutions by treating the organic solutions, obtained in the phase boundary processes, of the thermoplastic polycarbonates with vapors of benzene or alkylbenzenes.
    Type: Grant
    Filed: August 5, 1985
    Date of Patent: December 23, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Heinrich Meyer, Uwe Hucks, August Horsthemke