Granted Patent
Utility
US 5,630,852 · App. 08/344,763
Organophosphorus additives for improved fuel lubricity
Inventor:
Douglas G. Placek
Patented Case
View Patent ↗
Granted: May 20, 1997
Filed: Nov 23, 1994
Inventor
Douglas G. Placek
Assignee (at issue)
FMC CORPORATION
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.