Granted Patent
Utility
US 4,900,823 · App. 07/139,564
Phenyl ketone derivatives
Inventors:
Rinaldo Husler, Rudolf Kirchmayr, Werner Rutsch
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Dec 30, 1987
Inventors
Rinaldo Husler
Rudolf Kirchmayr
Werner Rutsch
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.