Granted Patent
Utility
US 4,384,057 · App. 06/146,581
Composition containing a condensation product of 1,3-diiminoisoindoline and cyanoacetic anilide used to pigment an organic lacquer resin
Inventor:
Jost von der Crone
Patented Case
View Patent ↗
Granted: May 17, 1983
Filed: May 5, 1980
Inventor
Jost von der Crone
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.