Granted Patent
Utility
US 6,604,941 · App. 09/892,239
Refractory crucibles and molds for containing reactive molten metals and salts
Inventor:
Garth W. Billings
Patented Case
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Granted: Aug 12, 2003
Filed: Jun 26, 2001
Inventor
Garth W. Billings
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.