Granted Patent
Utility
US 5,826,656 · App. 08/642,743
Method for recovering waterflood residual oil
Inventors:
Patrick L. McGuire, Joseph L. Anders
Patented Case
View Patent ↗
Granted: Oct 27, 1998
Filed: May 3, 1996
Inventors
Patrick L. McGuire
Joseph L. Anders
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.