Granted Patent
Utility
US 4,559,631 · App. 06/651,225
Heat treating furnace with graphite heating elements
Inventor:
Craig A. Moller
Patented Case
View Patent ↗
Granted: Dec 17, 1985
Filed: Sep 14, 1984
Inventor
Craig A. Moller
Assignee (at issue)
Abar Ipsen Industries, 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.