Granted Patent
Utility
US 4,517,358 · App. 06/418,177
Disazo bis-benzthiazolyl compounds
Inventor:
Visvanathan Ramanathan
Patented Case
View Patent ↗
Granted: May 14, 1985
Filed: Sep 14, 1982
Inventor
Visvanathan Ramanathan
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.