Granted Patent
Utility
US 6,406,515 · App. 09/897,963
Process and device for purification of aluminum by segregation
Inventor:
Michel Leroy
Patented Case
View Patent ↗
Granted: Jun 18, 2002
Filed: Jul 5, 2001
Inventor
Michel Leroy
Assignee (at issue)
Aluminum Pechiney
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.