Granted Patent
Utility
US 6,520,263 · App. 09/861,426
Retaining apparatus for use in a wellhead assembly and method for using the same
Inventor:
David R. June
Patented Case
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Granted: Feb 18, 2003
Filed: May 18, 2001
Inventor
David R. June
Assignee (at issue)
Cooper Cameron Corporation
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.