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:
Feb. 08, 2005
Filed:
Jul. 24, 2001
Christoph Sigwart, Schriesheim, DE;
Anton Meier, Kapellen, BE;
Michael Hesse, Worms, DE;
Volkmar Menger, Neustadt, DE;
Klaus-peter Pfaff, Friedelsheim, DE;
Arthur Höhn, Kirchheim, DE;
Lothar Franz, Baton Rouge, LA (US);
Christoph Sigwart, Schriesheim, DE;
Anton Meier, Kapellen, BE;
Michael Hesse, Worms, DE;
Volkmar Menger, Neustadt, DE;
Klaus-Peter Pfaff, Friedelsheim, DE;
Arthur Höhn, Kirchheim, DE;
Lothar Franz, Baton Rouge, LA (US);
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
In a process for preparing polytetrahydrofuran, tetrahydrofuran copolymers, diesters or monoesters of these polymers having a low color number, the polymers obtained by cationic polymerization of tetrahydrofuran are hydrogenated in the presence of a macroporous, supported heterogeneous catalyst comprising at least one metal of groups 7 to 10 of the Periodic Table of the Elements as active metal.