Patents by Inventor Robert Crombach

Robert Crombach 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).

  • Solid-state post-condensation process for increasing the molecular weight of a polyamide
    Publication number: 20050119444
    Abstract: The invention relates to a process for increasing the molecular weight of a polyamide via solid-state post-condensation by exposing the polyamide in the solid-state at elevated temperature to an inert gas atmosphere, that comprises a step (a) wherein the gas atmosphere to which the polyamide is exposed has a dew temperature Tdew-1, followed by a step (b) wherein the gas atmosphere to which the polyamide is exposed has a dew temperature Tdew-2, whereby Tdew-1 is higher than Tdew-2. The effect is that a high molecular weight polyamide can be obtained in a shorter production time.
    Type: Application
    Filed: January 7, 2003
    Publication date: June 2, 2005
    Applicant: DSM IP Assets B.V.
    Inventors: Robert Crombach, Rudy Rulkens