Granted Patent
Utility
US 4,931,196 · App. 07/275,816
Lubricant composition containing multifunctional lubricant additives
Inventors:
John David Payne, Robert M. O'Neil
Patented Case
View Patent ↗
Granted: Jun 5, 1990
Filed: Nov 25, 1988
Inventors
John David Payne
Robert M. O'Neil
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.