Granted Patent
Utility
US 4,334,932 · App. 06/251,423
Pigment formulations, processes for their preparation and their use for pigmenting aqueous, alcoholic or aqueous-alcoholic printing ink systems and colored lacquer systems
Inventor:
Armand Roueche
Patented Case
View Patent ↗
Granted: Jun 15, 1982
Filed: Apr 6, 1981
Inventor
Armand Roueche
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.