Granted Patent
Utility
US 5,607,574 · App. 08/437,338
Method of breaking reverse emulsions in a crude oil desalting system
Inventor:
Paul R. Hart
Patented Case
View Patent ↗
Granted: Mar 4, 1997
Filed: May 9, 1995
Inventor
Paul R. Hart
Assignee (at issue)
Betzdearborn, 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.