Granted Patent
Utility
US 6,830,723 · App. 10/384,481
Apparatus for treating molten metal having a sealed treatment zone
Inventors:
Richard Larouche, Daniel Maltais
Patented Case
View Patent ↗
Granted: Dec 14, 2004
Filed: Mar 7, 2003
Inventors
Richard Larouche
Daniel Maltais
Assignee (at issue)
Alcan International Limited
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.