Granted Patent
Utility
US 4,537,598 · App. 06/614,222
Process for trichromatic dyeing or printing of polyamide
Inventors:
Harry Schaetzer, Helmut Raisin, Dieter Mausezahl
Patented Case
View Patent ↗
Granted: Aug 27, 1985
Filed: May 24, 1984
Inventors
Harry Schaetzer
Helmut Raisin
Dieter Mausezahl
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.