Granted Patent
Utility
US 4,351,054 · App. 06/240,514
Optimized mixing and melting electric furnace
Inventor:
Leonard E. Olds
Patented Case
View Patent ↗
Granted: Sep 21, 1982
Filed: Mar 4, 1981
Inventor
Leonard E. Olds
Assignee (at issue)
Manville Service 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.