Granted Patent
Utility
US 4,311,565 · App. 06/151,482
Electrochemical process for the production of benzanthrone
Inventors:
Jacques Bersier, Horst Jager, Hansrudolf Schwander
Patented Case
View Patent ↗
Granted: Jan 19, 1982
Filed: May 19, 1980
Inventors
Jacques Bersier
Horst Jager
Hansrudolf Schwander
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.