Granted Patent
Utility
US 4,886,609 · App. 07/106,826
Method for stimulation of oil and gas wells
Inventor:
William B. Walton
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Oct 9, 1987
Inventor
William B. Walton
Assignee (at issue)
GAF Corporation
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.