Granted Patent
Utility
US 5,068,434 · App. 07/301,929
Process for the preparation of N-alkylated anilines
Inventors:
Gunter Klug, Hans-Josef Buysch, Lothar Puppe
Patented Case
View Patent ↗
Granted: Nov 26, 1991
Filed: Jan 25, 1989
Inventors
Gunter Klug
Hans-Josef Buysch
Lothar Puppe
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.