Granted Patent
Utility
US 6,686,402 · App. 09/964,963
Cold-box foundry binder systems
Inventors:
Wayne D. Woodson, H. Randall Shriver
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Sep 27, 2001
Inventors
Wayne D. Woodson
H. Randall Shriver
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.