Granted Patent
Utility
US 5,328,995 · App. 08/009,427
Azo dyes containing triazine middle components and a 1,4-phenylene-2,5-disubstituted coupling component
Inventors:
Rudolf Schaulin, Urs Lauk
Patented Case
View Patent ↗
Granted: Jul 12, 1994
Filed: Jan 27, 1993
Inventors
Rudolf Schaulin
Urs Lauk
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.