Granted Patent
Utility
US 6,581,691 · App. 09/938,881
Landing adapter for soft landing a tubing hanger in the bore of a production tree or wellhead housing
Inventors:
Charles E. Jennings, Norman Brammer
Patented Case
View Patent ↗
Granted: Jun 24, 2003
Filed: Aug 27, 2001
Inventors
Charles E. Jennings
Norman Brammer
Assignee (at issue)
ABB Vetco Gray 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.