Granted Patent
Utility
US 5,380,448 · App. 08/192,369
Process for metal salts of hydrocarbyl dithiophosphoric acid
Inventors:
Abbas Kadkhodayan, Dale G. Pillsbury, Paul G. Griffin
Patented Case
View Patent ↗
Granted: Jan 10, 1995
Filed: Feb 7, 1994
Inventors
Abbas Kadkhodayan
Dale G. Pillsbury
Paul G. Griffin
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.