Granted Patent
Utility
US 5,017,706 · App. 07/332,199
Monoketopyrrolopyrroles
Inventors:
Alain C. Rochat, Abul Iqbal, Olof Wallquist
Patented Case
View Patent ↗
Granted: May 21, 1991
Filed: Apr 3, 1989
Inventors
Alain C. Rochat
Abul Iqbal
Olof Wallquist
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.