Patents by Inventor Ute Wollborn

Ute Wollborn 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).

  • PRODUCTS HAVING IMPROVED FLAME RESISTANCE
    Publication number: 20110098386
    Abstract: The present invention relates to flame-retardant compositions containing: A. 65 to 99.998 wt. % polycarbonate, B. 0.001 to 1 wt. % of an organic flame-retardant salt selected from the group consisting of alkali and alkaline-earth salts of aliphatic and aromatic sulfonic acid, sulfonamide and sulfonimide derivatives and mixtures thereof, and C. 0.001 to 1 wt. % of one or more bromine-containing flame-retardant additives, characterised in that that the overall composition contains 100 ppm to 1000 ppm bromine.
    Type: Application
    Filed: August 25, 2010
    Publication date: April 28, 2011
    Applicant: Bayer MaterialScience AG
    Inventors: Berit Krauter, Hans Franssen, Ute Wollborn, Michael Wagner
  • 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
  • Process for the production of polyether block copolysulfones
    Patent number: 6365678
    Abstract: A process for the production of polyether block copolysulfones via trans-etherification is disclosed. In the inventive process, an aromatic sulfone polymer is reacted with an aliphatic polyether having on average at least one terminal OH function, preferably in the presence of a basic catalyst. In a preferred embodiment the reaction is carried out in a dipolar aprotic solvent.
    Type: Grant
    Filed: February 10, 2000
    Date of Patent: April 2, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Knud Reuter, Claus-Ludolf Schultz, Ute Wollborn, Heinz Pudleiner
  • Iminodisuccinate-containing polymers
    Patent number: 5679761
    Abstract: The polymers according to the invention with repeating succinyl units additionally contain iminodisuccinate units.
    Type: Grant
    Filed: August 15, 1995
    Date of Patent: October 21, 1997
    Assignee: Bayer AG
    Inventors: Lutz Heuer, Winfried Joentgen, Torsten Groth, Hans-Joachim Traenckner, Nikolaus Muller, Hermann Uhr, Klaus-Peter Heise, Karl-Hermann Brucher, Joachim-Reinhard Wesener, Ute Wollborn, Hans-Georg Pirkl, Thomas Menzel, Ulrich Liesenfelder, Paul Wagner