Granted Patent
Utility
US 4,474,236 · App. 06/469,093
Method and apparatus for remote installations of dual tubing strings in a subsea well
Inventor:
Rodney Kellett
Patented Case
View Patent ↗
Granted: Oct 2, 1984
Filed: Feb 23, 1983
Inventor
Rodney Kellett
Assignee (at issue)
Cameron Iron Works, 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.