Granted Patent
Utility
US 5,531,890 · App. 08/434,265
Oil separation and disposal systems
Inventor:
Alexander J. Keenan
Patented Case
View Patent ↗
Granted: Jul 2, 1996
Filed: May 3, 1995
Inventor
Alexander J. Keenan
Assignee (at issue)
Atlantic Richfield Company
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.