Granted Patent
Utility
US 4,490,474 · App. 06/503,540
Fused cast high chrome refractory and method for manufacturing same
Inventor:
Walter T. Staten
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Jun 13, 1983
Inventor
Walter T. Staten
Assignee (at issue)
Kennecott Holdings Company
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.