Granted Patent
Utility
US 6,670,457 · App. 10/222,309
Reactive dyes, their preparation and use
Inventors:
Rolf Deitz, Bernhard Muller, Athanassios Tzikas
Patented Case
View Patent ↗
Granted: Dec 30, 2003
Filed: Aug 16, 2002
Inventors
Rolf Deitz
Bernhard Muller
Athanassios Tzikas
Assignee (at issue)
Ciba Specialty Chemicals Corporation
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.