Granted Patent
Utility
US 4,490,030 · App. 06/520,378
Apparatus for the liquid-processing of light-sensitive sheet material
Inventors:
Leo Acklin, Marcel Rossier
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Aug 4, 1983
Inventors
Leo Acklin
Marcel Rossier
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.