Granted Patent
Utility
US 5,601,622 · App. 08/541,008
Fibre-reactive anthraquinone dyes, process for their preparation, and their use
Inventor:
Bernhard M uller
Patented Case
View Patent ↗
Granted: Feb 11, 1997
Filed: Oct 11, 1995
Inventor
Bernhard M uller
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.