Granted Patent
Utility
US 4,782,896 · App. 07/055,489
Retrievable fluid flow control nozzle system for wells
Inventor:
Eric B. Witten
Patented Case
View Patent ↗
Granted: Nov 8, 1988
Filed: May 28, 1987
Inventor
Eric B. Witten
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.