Granted Patent
Utility
US 4,290,809 · App. 06/175,620
Raw mix flux for continuous casting of steel
Inventor:
Charles M. Loane, Jr.
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Aug 6, 1980
Inventor
Charles M. Loane, Jr.
Assignee (at issue)
Mobay Chemical 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.