Granted Patent
Utility
US 4,818,247 · App. 07/053,526
Reactive azo dyes carrying two amine-fluoro-triazinyl groups for dyeing and printing cotton
Inventors:
Athanassios Tzikas, Adolf Kaser
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: May 21, 1987
Inventors
Athanassios Tzikas
Adolf Kaser
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.