Granted Patent
Utility
US 4,462,825 · App. 06/528,377
Method for increasing the scrap melting capability of metal refining processes
Inventor:
Charles Messina
Patented Case
View Patent ↗
Granted: Jul 31, 1984
Filed: Sep 1, 1983
Inventor
Charles Messina
Assignee (at issue)
United States Steel 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.