Granted Patent
Utility
US 6,768,032 · App. 10/114,288
Continuous isothermal process for preparing mononitrotoluenes in the presence of phosphoric acid
Inventors:
Matthias Gotta, Ralf Demuth, Eberhard Zirngiebl, Hans-Martin Weber, Georg Ronge
Patented Case
View Patent ↗
Granted: Jul 27, 2004
Filed: Apr 2, 2002
Inventors
Matthias Gotta
Ralf Demuth
Eberhard Zirngiebl
Hans-Martin Weber
Georg Ronge
Assignee (at issue)
Bayer Chemicals AG
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.