Granted Patent
Utility
US 4,260,503 · App. 06/097,296
Mercaptan as an additive for lubricants
Inventor:
Peter Michaelis
Patented Case
View Patent ↗
Granted: Apr 7, 1981
Filed: Nov 26, 1979
Inventor
Peter Michaelis
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.