Granted Patent
Utility
US 6,457,510 · App. 09/486,518
Method for compacting moulding sand
Inventor:
Daniel Jacobus Petrus van Heerveld
Patented Case
View Patent ↗
Granted: Oct 1, 2002
Filed: May 25, 2000
Inventor
Daniel Jacobus Petrus van Heerveld
Assignee (at issue)
Vulcan Engineering Company
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.