Granted Patent
Utility
US 4,598,155 · App. 06/441,829
3(5-tetrazolyl)1,4-diaminoanthraquinones
Inventor:
Jean-Marie Adam
Patented Case
View Patent ↗
Granted: Jul 1, 1986
Filed: Nov 15, 1982
Inventor
Jean-Marie Adam
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.