Granted Patent
Utility
US 5,636,693 · App. 08/359,783
Gas well tubing flow rate control
Inventor:
William G. Elmer
Patented Case
View Patent ↗
Granted: Jun 10, 1997
Filed: Dec 20, 1994
Inventor
William G. Elmer
Assignee (at issue)
Conoco 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.