Granted Patent
Utility
US 6,593,397 · App. 10/238,176
Furan no-bake foundry binders and their use
Inventor:
Ken K. Chang
Patented Case
View Patent ↗
Granted: Jul 15, 2003
Filed: Sep 10, 2002
Inventor
Ken K. Chang
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.