Patents by Inventor Stephan Eckelmann

Stephan Eckelmann 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 producing high molecular weight polyoxyalkylene polyols
    Patent number: 10457775
    Abstract: The invention relates to an efficient method for producing polyoxyalkylene polyols with equivalent molar masses between 9500 and 23000 g/mol from one or more H-functional starter compounds, and one or more alkylene oxides in the presence of a double metal cyanide catalyst, characterized in that the alkylene oxide metering rate is reduced once a calculated equivalent molar mass of between 8000 and 9500 g/mol is reached.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: October 29, 2019
    Assignee: Covestro Deutschland AG
    Inventors: Klaus Lorenz, Christian Steinlein, Horst Zwick, Markus Bodenmüller, Stephan Eckelmann, Friedhelm Baer
  • METHOD FOR PRODUCING HIGH MOLECULAR WEIGHT POLYOXYALKYLENE POLYOLS
    Publication number: 20180244842
    Abstract: The invention relates to an efficient method for producing polyoxyalkylene polyols with equivalent molar masses between 9500 and 23000 g/mol from one or more H-functional starter compounds, and one or more alkylene oxides in the presence of a double metal cyanide catalyst, characterised in that the alkylene oxide metering rate is reduced once a calculated equivalent molar mass of between 8000 and 9500 g/mol is reached.
    Type: Application
    Filed: August 23, 2016
    Publication date: August 30, 2018
    Inventors: Klaus Lorenz, Christian Steinlein, Horst Zwick, Markus Bodenmüller, Stephan Eckelmann, Friedhelm Baer