Granted Patent
Utility
US 6,409,176 · App. 09/166,379
Wellhead housing seal assembly with backup feature
Inventor:
Timothy J. Allen
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: Oct 5, 1998
Inventor
Timothy J. Allen
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.