Granted Patent
Utility
US 5,800,738 · App. 08/664,017
Methods for inhibiting foam in crude oils
Inventor:
Paul R. Hart
Patented Case
View Patent ↗
Granted: Sep 1, 1998
Filed: Jun 13, 1996
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.