Granted Patent
Utility
US 6,488,084 · App. 09/696,494
Casing hanger seal positive stop
Inventor:
Eugene Borak
Patented Case
View Patent ↗
Granted: Dec 3, 2002
Filed: Oct 25, 2000
Inventor
Eugene Borak
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.