Granted Patent
Utility
US 5,236,591 · App. 07/843,747
Method of removing benzene from petroleum desalter brine
Inventor:
Paul R. Hart
Patented Case
View Patent ↗
Granted: Aug 17, 1993
Filed: Feb 28, 1992
Inventor
Paul R. Hart
Assignee (at issue)
Betz Laboratories, Inc.
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.