Granted Patent
Utility
US 4,403,267 · App. 06/378,078
Electrically heated vacuum furnace with a fault detection system
Inventors:
Steven H. Verhoff, David A. Krieger
Patented Case
View Patent ↗
Granted: Sep 6, 1983
Filed: May 14, 1982
Inventors
Steven H. Verhoff
David A. Krieger
Assignee (at issue)
Midland-Ross 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.