Patents by Inventor Guenter Jueptner

Guenter Jueptner 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).

  • Publication number: 20110224372
    Abstract: The present invention relates to an improved process for preparing linear polycarbonates having an improved technique for adding a coupling catalyst compound, specifically the addition of the coupling catalyst at two or more separate, different points in the process. Linear polycarbonate resins prepared by said process demonstrate a lower level of polycarbonate oligomers and an improved balance of properties, in particular improved impact strength and lower ductile brittle transition temperature.
    Type: Application
    Filed: November 16, 2009
    Publication date: September 15, 2011
    Inventors: Guenter Jueptner, Bernhard Elbert