Patents by Inventor Els Paredis

Els Paredis 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).

  • Method for processing polyether alcohols
    Publication number: 20040073069
    Abstract: In a process for working up polyether monools which have been prepared by ring-opening polymerization of epoxides by means of OH-functional starters using at least one heterogeneous catalyst, the heterogeneous catalyst or catalysts is/are separated off from the polyether monool by means of a membrane separation process.
    Type: Application
    Filed: May 22, 2003
    Publication date: April 15, 2004
    Inventors: Wolfgang Heider, Edward Bohres, Georg Heinrich Grosch, Hartwig Voss, Gerd Hoppner, Kathrin Harre, Els Paredis, Jurgen Winkler, Michael Stosser, Wilfried Sager, Thomas Barth, Hannelore Barth, Georg Hans Barth
  • Method for production of polyether alcohols
    Patent number: 6653441
    Abstract: In a process for preparing polyether alcohols by catalytic addition of at least two alkylene oxides onto H-functional initiator substances, at least one multimetal cyanide compound is used as catalyst and the addition of the alkylene oxides onto the initiator substance includes incorporation of at least one oxyalkylene block during whose formation at least two alkylene oxides are metered in together and the ratio of the alkylene oxides to one another in the mixture is changed during the joint introduction.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: November 25, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Kathrin Harre, Gerd Höppner, Georg Heinrich Grosch, Stephan Bauer, Jürgen Winkler, Els Paredis, Reinhard Lorenz, Inge Rotermund
  • Method for production of polyether alcohols
    Publication number: 20020183482
    Abstract: In a process for preparing polyether alcohols by catalytic addition of at least two alkylene oxides onto H-functional initiator substances, at least one multimetal cyanide compound is used as catalyst and the addition of the alkylene oxides onto the initiator substance includes incorporation of at least one oxyalkylene block during whose formation at least two alkylene oxides are metered in together and the ratio of the alkylene oxides to one another in the mixture is changed during the joint introduction.
    Type: Application
    Filed: May 21, 2002
    Publication date: December 5, 2002
    Inventors: Kathrin Harre, Gerd Hoppner, Georg Heinrich Grosch, Stephan Bauer, Jurgen Winkler, Els Paredis, Reinhard Lorenz, Inge Rotermund