Patents by Inventor Hans Ludwig Krauss

Hans Ludwig Krauss 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 for the preparation of isoolefin copolymers
    Publication number: 20040116627
    Abstract: The present invention provides a novel process for the preparation of isoolefin copolymers in the presence of zirconium halides and/or hafnium halides and organic acid halides, in particular for the preparation of butyl rubbers, as well as isoolefin copolymers constructed of isobutene, isoprene and optionally further monomers.
    Type: Application
    Filed: November 17, 2003
    Publication date: June 17, 2004
    Inventors: Gerhard Langstein, Jurgen Ismeier, Martin Bohnenpoll, Hans Ludwig Krauss, Rui Resendes
  • Process for the preparation of isoolefin copolymers
    Patent number: 6677421
    Abstract: The present invention provides a novel process for the preparation of isoolefin copolymers in the presence of zirconium halides and/or hafnium halides and organic acid halides, in particular for the preparation of butyl rubbers, as well as isoolefin copolymers constructed of isobutene, isoprene and optionally further monomers.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: January 13, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerhard Langstein, Jürgen Ismeier, Martin Bohnenpoll, Hans Ludwig Krauss, Rui Resendes
  • Process for the preparation of isoolefin copolymers
    Publication number: 20030040590
    Abstract: The present invention provides a novel process for the preparation of isoolefin copolymers in the presence of zirconium halides and/or hafnium halides and organic acid halides, in particular for the preparation of butyl rubbers, as well as isoolefin copolymers constructed of isobutene, isoprene and optionally further monomers.
    Type: Application
    Filed: August 16, 2002
    Publication date: February 27, 2003
    Inventors: Gerhard Langstein, Jurgen Ismeier, Martin Bohnenpoll, Hans Ludwig Krauss, Rui Resendes