Granted Patent
Utility
US 5,252,254 · App. 07/998,437
Naphthenic acid corrosion inhibitor
Inventor:
Elizabeth Babaian-Kibala
Patented Case
View Patent ↗
Granted: Oct 12, 1993
Filed: Dec 30, 1992
Inventor
Elizabeth Babaian-Kibala
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.