Granted Patent
Utility
US 4,304,954 · App. 06/045,485
Apparatus for casting fused refractory oxides having high melting points
Inventor:
Paul Cichy
Patented Case
View Patent ↗
Granted: Dec 8, 1981
Filed: Jun 4, 1979
Inventor
Paul Cichy
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.