Granted Patent
Utility
US 5,085,710 · App. 07/429,360
Method of using an aqueous chemical system to recover hydrocarbon and minimize wastes from sludge deposits in oil storage tanks
Inventor:
Michael Goss
Patented Case
View Patent ↗
Granted: Feb 4, 1992
Filed: Oct 31, 1989
Inventor
Michael Goss
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.