Granted Patent
Utility
US 5,218,009 · App. 07/751,048
Mono- and di-acylphosphine oxides
Inventors:
Werner Rutsch, Kurt Dietliker, Roger Graham Hall
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: Aug 28, 1991
Inventors
Werner Rutsch
Kurt Dietliker
Roger Graham Hall
Assignee (at issue)
Ciba-Geigy
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.