Granted Patent
Utility
US 6,835,687 · App. 10/257,706
Method for producing double metal cyanide (DMC) catalysts
Inventors:
Jörg Hofmann, Stephan Ehlers, Bernd Klinksiek, Thorsten Fechtel, Matthias Ruhland, Jürgen Scholz, Franz Föhles, Ulrich Esser
Patented Case
View Patent ↗
Granted: Dec 28, 2004
Filed: Mar 5, 2003
Inventors
Jörg Hofmann
Stephan Ehlers
Bernd Klinksiek
Thorsten Fechtel
Matthias Ruhland
Jürgen Scholz
Franz Föhles
Ulrich Esser
Assignee (at issue)
Bayer Aktiengesellschaft
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.