Granted Patent
Utility
US 4,849,571 · App. 07/196,702
Hydrocarbon production
Inventor:
Anne Mae Gaffney
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: May 20, 1988
Inventor
Anne Mae Gaffney
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.