Granted Patent
Utility
US 6,000,438 · App. 09/023,733
Phase change insulation for subsea flowlines
Inventor:
Theodore R. Ohrn
Patented Case
View Patent ↗
Granted: Dec 14, 1999
Filed: Feb 13, 1998
Inventor
Theodore R. Ohrn
Assignee (at issue)
McDermott Technology, 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.