Granted Patent
Utility
US 4,894,166 · App. 07/237,628
Method for cleaning oil-contaminated water in a swimming or bathing area
Inventor:
Robert L. Pitts
Patented Case
View Patent ↗
Granted: Jan 16, 1990
Filed: Aug 28, 1988
Inventor
Robert L. Pitts
Assignee (at issue)
Packaging Industries Group, 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.