Granted Patent
Utility
US 4,563,190 · App. 06/528,027
Dyeing assistant and use thereof for dyeing or printing synthetic polyamide fibre material
Inventor:
Rosemarie Topfl
Patented Case
View Patent ↗
Granted: Jan 7, 1986
Filed: Aug 31, 1983
Inventor
Rosemarie Topfl
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.