Granted Patent
Utility
US 6,729,658 · App. 09/926,678
Threaded tubular element for fatigue resistant threaded tubular joint and resulting threaded tubular joint
Inventor:
Lionel Verdillon
Patented Case
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Granted: May 4, 2004
Filed: Feb 22, 2002
Inventor
Lionel Verdillon
Assignees (at issue)
VALLOUREC MANNESMANN OIL & GAS FRANCE
SUMITOMO METAL INDUSTRIES, LTD.
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.