Granted Patent
Utility
US 4,923,481 · App. 07/285,845
Aqueous dispersion of a metallizable dye and sulfonated aromatic condensate
Inventors:
Roberto Galli, Ernst Tempel
Patented Case
View Patent ↗
Granted: May 8, 1990
Filed: Dec 16, 1988
Inventors
Roberto Galli
Ernst Tempel
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.