Granted Patent
Utility
US 6,315,006 · App. 09/781,774
Pipe insulation coupling
Inventor:
Orval A. Opperthauser
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: Feb 12, 2001
Inventor
Orval A. Opperthauser
Assignee (at issue)
HYDRA-ZORB
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.