Granted Patent
Utility
US 4,871,022 · App. 07/193,254
Method for removing polymer plugging in well boreholes
Inventor:
Mark S. McGlathery
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: May 11, 1988
Inventor
Mark S. McGlathery
Assignee (at issue)
Exxon Chemical Patents, 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.