Granted Patent
Utility
US 4,929,719 · App. 07/394,302
Fiber-reactive dyes containing an aniline radical which carries two different vinylsulfonyl moieties
Inventors:
Hansrudolf Schwander, Athanassios Tzikas, Peter Aeschlimann
Patented Case
View Patent ↗
Granted: May 29, 1990
Filed: Aug 10, 1989
Inventors
Hansrudolf Schwander
Athanassios Tzikas
Peter Aeschlimann
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.