Patents by Inventor Thomas Gra?ler

Thomas Gra?ler 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).

  • Method for the polymerization of cyclic ethers
    Patent number: 7544766
    Abstract: The present invention relates to a process for preparing polytetrahydrofuran, polytetrahydrofuran copolymer, diester or monoester by polymerizing tetrahydrofuran in the presence of at least one telogen and/or comonomer and of an acidic heterogeneous catalyst based on activated sheet silicates or mixed metal oxides in a fluidized bed.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: June 9, 2009
    Assignee: BASF SE
    Inventors: Stephan Schlitter, Martin Haubner, Peter Zehner, Michael Hesse, Alexander Weck, Rolf Pinkos, Thomas Graβler