Granted Patent
Utility
US 5,593,572 · App. 08/286,024
Settling aids for solids in hydrocarbons
Inventor:
Paul R. Hart
Patented Case
View Patent ↗
Granted: Jan 14, 1997
Filed: Aug 4, 1994
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.