Granted Patent
Utility
US 4,382,890 · App. 06/114,761
Fiber reactive sulfo aryl azo N-substituted pyridone-3-carboxamide dyestuffs
Inventors:
Rene de Montmollin, Dieter Mausezahl
Patented Case
View Patent ↗
Granted: May 10, 1983
Filed: Jan 23, 1980
Inventors
Rene de Montmollin
Dieter Mausezahl
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.