Granted Patent
Utility
US 5,273,669 · App. 07/951,377
Lubricant composition
Inventors:
Rolf Schumacher, Samuel Evans, Paul Dubs
Patented Case
View Patent ↗
Granted: Dec 28, 1993
Filed: Sep 25, 1992
Inventors
Rolf Schumacher
Samuel Evans
Paul Dubs
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.