Granted Patent
Utility
US 6,479,567 · App. 09/519,025
Furan no-bake foundry binders and their use
Inventor:
Ken K. Chang
Patented Case
View Patent ↗
Granted: Nov 12, 2002
Filed: Mar 3, 2000
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.