Granted Patent
Utility
US 4,394,227 · App. 06/354,109
Electrochemical process for the preparation of benzanthrones and planar, polycyclic aromatic oxygen-containing compounds
Inventors:
Horst Jager, Eric Plattner, Jacques Bersier, Christos Comninellis
Patented Case
View Patent ↗
Granted: Jul 19, 1983
Filed: Mar 2, 1982
Inventors
Horst Jager
Eric Plattner
Jacques Bersier
Christos Comninellis
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.