Granted Patent
Utility
US 5,160,425 · App. 07/718,623
Method of inhibiting formation of fouling materials during basic washing of hydrocarbons contaminated with oxygen compounds
Inventor:
Vincent E. Lewis
Patented Case
View Patent ↗
Granted: Nov 3, 1992
Filed: Jun 21, 1991
Inventor
Vincent E. Lewis
Assignee (at issue)
Nalco Chemical Company
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.