Granted Patent
Utility
US 4,925,580 · App. 07/284,569
Thiadiazole derivatives as lubricant additives
Inventor:
Hugo Camenzind
Patented Case
View Patent ↗
Granted: May 15, 1990
Filed: Dec 15, 1988
Inventor
Hugo Camenzind
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.