Granted Patent
Utility
US 5,011,398 · App. 07/561,290
Apparatus for lost foam molding and method of assembling same
Inventor:
Russell J. VanRens
Patented Case
View Patent ↗
Granted: Apr 30, 1991
Filed: Jul 26, 1990
Inventor
Russell J. VanRens
Assignee (at issue)
Outboard Marine Corporation
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.