Granted Patent
Utility
US 5,435,807 · App. 08/126,815
Process for dyeing wool-containing fibre materials with anionic dyes in the presence of a wool protective agent
Inventor:
Martin Kuhn
Patented Case
View Patent ↗
Granted: Jul 25, 1995
Filed: Sep 24, 1993
Inventor
Martin Kuhn
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.