Granted Patent
Utility
US 4,523,030 · App. 06/618,152
Benzophenones
Inventors:
Georges Haas, Andreas von Sprecher, Pier G. Ferrini
Patented Case
View Patent ↗
Granted: Jun 11, 1985
Filed: Jun 7, 1984
Inventors
Georges Haas
Andreas von Sprecher
Pier G. Ferrini
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.