Granted Patent
Utility
US 4,487,527 · App. 06/409,369
Subsea wellhead assembly
Inventor:
Thomas P. Kelly
Patented Case
View Patent ↗
Granted: Dec 11, 1984
Filed: Aug 19, 1982
Inventor
Thomas P. Kelly
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.