Granted Patent
Utility
US 5,756,848 · App. 08/742,293
Process for preparing secondary arylphosphine oxides
Inventor:
Hans-Jerg Kleiner
Patented Case
View Patent ↗
Granted: May 26, 1998
Filed: Nov 4, 1996
Inventor
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.