Granted Patent
Utility
US 5,403,363 · App. 08/159,301
Dye mixtures containing azo dyes having a coupling component from the diaminopyridine series
Inventors:
Hermann Loeffler, Gunther Lamm, Volker Bach, Arno Lange, Helmut Reichelt, Herbert Rothmaier
Patented Case
View Patent ↗
Granted: Apr 4, 1995
Filed: Nov 30, 1993
Inventors
Hermann Loeffler
Gunther Lamm
Volker Bach
Arno Lange
Helmut Reichelt
Herbert Rothmaier
Assignee (at issue)
BASF SE
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.