Granted Patent
Utility
US 5,190,933 · App. 07/845,871
Substituted propane-phosphinic acid compounds
Inventors:
Eric K. Baylis, Ludwig Maier, Stuart J. Mickel, Hans-Rudolf Olpe, Helmut Bittiger, Wolfgang Frostl, Roger Graham Hall
Patented Case
View Patent ↗
Granted: Mar 2, 1993
Filed: Mar 3, 1992
Inventors
Eric K. Baylis
Ludwig Maier
Stuart J. Mickel
Hans-Rudolf Olpe
Helmut Bittiger
Wolfgang Frostl
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.