Granted Patent
Utility
US 4,544,492 · App. 06/605,947
Lubricant compositions
Inventors:
Horst Zinke, Rolf Schumacher
Patented Case
View Patent ↗
Granted: Oct 1, 1985
Filed: May 1, 1984
Inventors
Horst Zinke
Rolf Schumacher
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.