Granted Patent
Utility
US 6,426,374 · App. 09/627,993
Foundry binder compositions and mixes that contain a divalent sulfur compound
Inventor:
Michael J. Skoglund
Patented Case
View Patent ↗
Granted: Jul 30, 2002
Filed: Jul 28, 2000
Inventor
Michael J. Skoglund
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.