Granted Patent
Utility
US 5,180,510 · App. 07/175,522
Antioxidant additive and lubricating oil containing same
Inventors:
Edward F. Zaweski, Scott A. Culley
Patented Case
View Patent ↗
Granted: Jan 19, 1993
Filed: Mar 31, 1988
Inventors
Edward F. Zaweski
Scott A. Culley
Assignee (at issue)
Ethyl Petroleum Additives, Inc.
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.