Granted Patent
Utility
US 5,344,579 · App. 08/109,764
Friction modifier compositions and their use
Inventors:
Hiroko Ohtani, Rolfe J. Hartley
Patented Case
View Patent ↗
Granted: Sep 6, 1994
Filed: Aug 20, 1993
Inventors
Hiroko Ohtani
Rolfe J. Hartley
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.