Granted Patent
Utility
US 6,293,990 · App. 09/479,996
Aluminum alloy semi-finished product manufacturing process using recycled raw materials
Inventors:
Jean-Francois Verdier, Michel Leroy, Laurent Calaque
Patented Case
View Patent ↗
Granted: Sep 25, 2001
Filed: Jan 10, 2000
Inventors
Jean-Francois Verdier
Michel Leroy
Laurent Calaque
Assignee (at issue)
Pechiney Rhenalu
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.