Patents by Inventor Karin Regel

Karin Regel 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).

  • Increasing the molecular weight of polyesters
    Patent number: 6265533
    Abstract: This invention relates to a process for increasing the molecular weight of polyesters, copolyesters or polyester blends by adding an organic phosphate to the processing apparatus and fusing the mixture to above the melting point, in which process the processing apparatus is a single-screw extruder, twin-screw extruder, planetary-gear extruder, ring extruder or co-kneader having at least one vent zone to which underpressure is applied.
    Type: Grant
    Filed: October 19, 2000
    Date of Patent: July 24, 2001
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Karin Regel, Roland Andernach, Peter Schwarz, Heinz Herbst, Kurt Hoffmann, Rudolf Pfaendner, Dirk Simon