Granted Patent
Utility
US 5,328,619 · App. 07/718,788
Oil additive concentrates and lubricants of enhanced performance capabilities
Inventor:
Gregory S. Conary
Patented Case
View Patent ↗
Granted: Jul 12, 1994
Filed: Jun 21, 1991
Inventor
Gregory S. Conary
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.