Granted Patent
Utility
US 6,808,009 · App. 10/461,631
System for providing consistent flow through multiple permeable perimeter walls in a casting mold
Inventor:
Michael K. Anderson
Patented Case
View Patent ↗
Granted: Oct 26, 2004
Filed: Jun 12, 2003
Inventor
Michael K. Anderson
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.