Granted Patent
Utility
US 4,865,650 · App. 07/133,677
Novel compositions based on tetrachloroisoindolinone pigments
Inventors:
Jost von der Crone, Bernhard Medinger, Philippe Bugnon
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Dec 16, 1987
Inventors
Jost von der Crone
Bernhard Medinger
Philippe Bugnon
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.