Patents by Inventor Christoph Biedron

Christoph Biedron 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).

  • Process and apparatus for the preparation of polycarbonate
    Patent number: 8394912
    Abstract: The invention relates to a process for the pretreatment of material surfaces in order to minimize the interaction between polycarbonate and metal and, in the processing and synthesis of polycarbonate, to obtain a high-quality polymer which in particular does not become discolored and is free of insoluble constituents.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: March 12, 2013
    Assignee: Bayer MaterialScience AG
    Inventors: Frank Doebert, Andreas Stremmel, Christoph Biedron, Stephan Laue, Johann Rechner, Torsten Hagen, Frank Bruynseels, Frank Quaeyhaegens, Johan Decloedt, Paul Van Dorst, Uwe Arndt, Johan Vanden Eynde, Ursula Tracht, Thomas König, Ulrich Liesenfelder
  • PROCESS AND APPARATUS FOR THE PREPARATION OF POLYCARBONATE
    Publication number: 20110184144
    Abstract: The invention relates to a process for the pretreatment of material surfaces in order to minimize the interaction between polycarbonate and metal and, in the processing and synthesis of polycarbonate, to obtain a high-quality polymer which in particular does not become discoloured and is free of insoluble constituents.
    Type: Application
    Filed: December 20, 2010
    Publication date: July 28, 2011
    Applicant: Bayer MaterialScience AG
    Inventors: Frank Doebert, Andreas Stremmel, Christoph Biedron, Stephan Laue, Johann Rechner, Torsten Hagen, Frank Bruynseels, Frank Quaeyhaegens, Johan Decloedt, Paul Van Dorst, Uwe Arndt, Johan Vanden Eynde, Ursula Tracht, Thomas König, Ulrich Liesenfelder
  • Process for the separation of residual monomers and oligomers from polycarbonate
    Publication number: 20040116648
    Abstract: An improvement to the process of producing polycarbonate resin by the phase interface method is disclosed. The improvement comprising adding at least one chlorinated aromatic hydrocarbon to the organic phase.
    Type: Application
    Filed: October 15, 2003
    Publication date: June 17, 2004
    Inventors: Stefan Westernacher, Hermann Kauth, Klaus Fassbender, Bernd Willenberg, Andreas Frankenau, Rainer Mellis, Gary Conklin, Christoph Biedron
  • Process for the production of polycarbonate which is damaged to a particularly small extent by oxygen
    Publication number: 20040103717
    Abstract: A process for producing polycarbonate is disclosed. The process entails using equipment having leakage rate less than 10−3 liter He×mbar/sec. The polycarbonate thus produced is characterized by its enhanced thermal stability.
    Type: Application
    Filed: October 17, 2003
    Publication date: June 3, 2004
    Inventors: Stefan Westernacher, Wolfgang Ebert, Klaus Fassbender, Bernd Willenberg, Andreas Frankenau, Hermann Kauth, Gary Conklin, Christoph Biedron, Melanie Mothrath, Uwe Hucks, Ute Wollborn, Claus-Ludolf Schultz