Granted Patent
Utility
US 5,184,681 · App. 07/754,444
Telescoping riser joint and improved packer therefor
Inventor:
William L. Fontenot
Patented Case
View Patent ↗
Granted: Feb 9, 1993
Filed: Sep 3, 1991
Inventor
William L. Fontenot
Assignee (at issue)
Cooper Industries Holdings
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.