Granted Patent
Utility
US 5,593,936 · App. 08/410,466
Hydrated niobium oxide and hydrated tantalum oxide catalysts, their preparation and a process for preparing N-alkylated anilines using these catalysts
Inventors:
Volker Glock, Ursula Pentling, Bernd Pennemann, Joerg-Dietrich Jentsch, Eberhard Zirngiebl, Horst Koller
Patented Case
View Patent ↗
Granted: Jan 14, 1997
Filed: Mar 24, 1995
Inventors
Volker Glock
Ursula Pentling
Bernd Pennemann
Joerg-Dietrich Jentsch
Eberhard Zirngiebl
Horst Koller
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.