Granted Patent
Utility
US 4,906,737 · App. 07/233,923
Azo dye of the pyridone series containing a fluoro-s-triazinyl fibre-reactive group
Inventors:
Herbert Seiler, Gert Hegar, Ester Hegar-Zimmerman
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Aug 17, 1988
Inventors
Herbert Seiler
Gert Hegar
Ester Hegar-Zimmerman
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.