Granted Patent
Utility
US 4,417,346 · App. 06/278,053
High temperature melting furnace
Inventor:
Roger R. Giler
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Jun 29, 1981
Inventor
Roger R. Giler
Assignee (at issue)
Kanthal GmbH
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.