Granted Patent
Utility
US 4,908,436 · App. 06/921,849
Fibre-reactive azo dyes containing vinylsulfonyl groups and further aliphatic fibre-reactive radicals
Inventor:
Peter Scheibli
Patented Case
View Patent ↗
Granted: Mar 13, 1990
Filed: Oct 23, 1986
Inventor
Peter Scheibli
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.