Granted Patent
Utility
US 5,965,050 · App. 09/172,481
Curved graphite heating element for an electric resistance heating furnace
Inventors:
Fred W. Ripley, David Rinz
Patented Case
View Patent ↗
Granted: Oct 12, 1999
Filed: Oct 14, 1998
Inventors
Fred W. Ripley
David Rinz
Assignee (at issue)
Vacuum Furnace Systems Corporation
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.