Granted Patent
Utility
US 4,801,702 · App. 06/925,019
Process for the preparation and conditioning or organic pigments
Inventor:
Fridolin Babler
Patented Case
View Patent ↗
Granted: Jan 31, 1989
Filed: Oct 30, 1986
Inventor
Fridolin Babler
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.