Patents by Inventor Frank Guldentops

Frank Guldentops 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).

  • Polycarbonate composition having improved heat stability
    Patent number: 8716380
    Abstract: The invention relates to a polycarbonate composition having reduced subsequent yellowing of the mouldings produced therefrom on heat ageing and having good optical properties of the polycarbonate composition on processing.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: May 6, 2014
    Assignee: Bayer MaterialScience AG
    Inventors: Stephan Konrad, Heinrich Hähnsen, Karl-Heinz Köhler, Marc Buts, Daniel Koch, Frank Guldentops
  • UV-STABLE POLYCARBONATE COMPOSITION HAVING IMPROVED PROPERTIES
    Publication number: 20120232196
    Abstract: The invention relates to a UV-stabilised melt polycarbonate composition having improved melt flowability while at the same time having good optical properties and at the same time good hydrolytic stability, the composition comprising a melt polycarbonate, at least one UV absorber, at least one phosphine and optionally an aliphatic carboxylic acid ester.
    Type: Application
    Filed: September 17, 2010
    Publication date: September 13, 2012
    Applicant: Bayer MaterialScience AG
    Inventors: Stephan Konrad, Helmut Werner Heuer, Karl-Heinz Köhler, Rolf Wehrmann, Daniel Koch, Marc Buts, Frank Guldentops
  • POLYCARBONATE COMPOSITION HAVING IMPROVED HEAT STABILITY
    Publication number: 20110130500
    Abstract: The invention relates to a polycarbonate composition having reduced subsequent yellowing of the mouldings produced therefrom on heat ageing and having good optical properties of the polycarbonate composition on processing.
    Type: Application
    Filed: September 29, 2010
    Publication date: June 2, 2011
    Applicant: Bayer MaterialScience AG
    Inventors: Stephan Konrad, Heinrich Hähnsen, Karl-Heinz Köhler, Marc Buts, Daniel Koch, Frank Guldentops