Granted Patent
Utility
US 6,377,348 · App. 09/633,395
Smoke chamber for evaluating foundry sand shapes and its method of use
Inventor:
James T. Schneider
Patented Case
View Patent ↗
Granted: Apr 23, 2002
Filed: Aug 7, 2000
Inventor
James T. Schneider
Assignee (at issue)
Ashland, Inc.
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.