Granted Patent
Utility
US 5,041,671 · App. 07/369,290
Process for the preparation 4-chloro-2,5-dimethoxy-aniline
Inventors:
Klaus Warning, Kurt Habig
Patented Case
View Patent ↗
Granted: Aug 20, 1991
Filed: Jun 21, 1989
Inventors
Klaus Warning
Kurt Habig
Assignee (at issue)
Hoechst GmbH
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.