Granted Patent
Utility
US 5,789,623 · App. 08/661,629
Process for the preparation of hydroxybiarylphosphines and novel compounds of this group of substances
Inventors:
Dieter Regnat, Hans-Jerg Kleiner
Patented Case
View Patent ↗
Granted: Aug 4, 1998
Filed: Jun 11, 1996
Inventors
Dieter Regnat
Hans-Jerg Kleiner
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.