Granted Patent
Utility
US 5,817,779 · App. 08/783,183
Azo reactive dyes, their preparation and use
Inventors:
Rolf Deitz, Paul Herzig, Athanassios Tzikas
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: Jan 15, 1997
Inventors
Rolf Deitz
Paul Herzig
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.