Granted Patent
Utility
US 6,371,194 · App. 09/866,489
Method for producing core preforms and recycling core sand for a foundry
Inventor:
Thomas Steinhäuser
Patented Case
View Patent ↗
Granted: Apr 16, 2002
Filed: May 25, 2001
Inventor
Thomas Steinhäuser
Assignee (at issue)
VAW aluminium AG
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.