Patents by Inventor Stephan Maurer

Stephan Maurer 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).

  • Purification or work-up of ionic liquids by means of adsorptive separation processes
    Publication number: 20040188350
    Abstract: Process for the work-up of a mixture comprising ionic liquids and a further substance, wherein the substance present is separated off by means of adsorptive separation processes.
    Type: Application
    Filed: March 23, 2004
    Publication date: September 30, 2004
    Inventors: York Alexander Beste, Jurgen Ciprian, Stephan Maurer
  • Decoloration and color stabilization of TEDA solution
    Publication number: 20040186291
    Abstract: The present invention relates to a process for preparing TEDA solutions comprising a solvent selected from the group consisting of polyhydric alcohols and ethers of polyhydric alcohols. The process comprises passing gaseous TEDA into the solvent and subsequently treating the solutions with one or more suitable adsorbents. This gives solutions which have only low color numbers and are color-stable on storage. The solutions can be used as such in preferred applications of TEDA, preferably polyurethane production.
    Type: Application
    Filed: January 29, 2004
    Publication date: September 23, 2004
    Inventors: Jurgen Ciprian, Matthias Frauenkron, Stephan Maurer, Johann-Peter Melder