Granted Patent
Utility
US 5,772,866 · App. 08/907,326
Compositions and methods for breaking water-in-oil emulsions
Inventor:
Paul R. Hart
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Aug 6, 1997
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.