Granted Patent
Utility
US 4,525,170 · App. 06/496,036
Solid formulations of metal complex dyes
Inventor:
Paolo Balliello
Patented Case
View Patent ↗
Granted: Jun 25, 1985
Filed: May 19, 1983
Inventor
Paolo Balliello
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.