The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2009
Filed:
Dec. 23, 2003
Stephan Schlitter, Limburgerhof, DE;
Martin Haubner, Eppelheim, DE;
Peter Zehner, Ludwigshafen, DE;
Michael Hesse, Worms, DE;
Alexander Weck, Freinsheim, DE;
Rolf Pinkos, Bad Dürkheim, DE;
Thomas Graβler, Limburgerhof, DE;
Stephan Schlitter, Limburgerhof, DE;
Martin Haubner, Eppelheim, DE;
Peter Zehner, Ludwigshafen, DE;
Michael Hesse, Worms, DE;
Alexander Weck, Freinsheim, DE;
Rolf Pinkos, Bad Dürkheim, DE;
Thomas Graβler, Limburgerhof, DE;
BASF SE, Ludwigshafen, DE;
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.