Granted Patent
Utility
US 5,723,587 · App. 08/694,142
Azo dyes
Inventors:
Antoine Clement, Athanassios Tzikas
Patented Case
View Patent ↗
Granted: Mar 3, 1998
Filed: Aug 8, 1996
Inventors
Antoine Clement
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.