Granted Patent
Utility
US 5,380,466 · App. 08/048,555
Reaction product of nitrogen bases and phosphate esters as corrosion inhibitors
Inventor:
Richard L. Martin
Patented Case
View Patent ↗
Granted: Jan 10, 1995
Filed: Apr 15, 1993
Inventor
Richard L. Martin
Assignee (at issue)
Petrolite 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.