Granted Patent
Utility
US 6,033,901 · App. 09/271,949
System and process for in tank treatment of crude oil sludges to recover hydrocarbons and aid in materials separation
Inventor:
John Powell
Patented Case
View Patent ↗
Granted: Mar 7, 2000
Filed: Mar 18, 1999
Inventor
John Powell
Assignee (at issue)
APLC, 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.