Granted Patent
Utility
US 5,744,518 · App. 08/509,602
Biphenyl additive for improvement in urethane foundry binders
Inventor:
Michael M. Geoffrey
Patented Case
View Patent ↗
Granted: Apr 28, 1998
Filed: Jul 31, 1995
Inventor
Michael M. Geoffrey
Assignee (at issue)
Borden Chemical, 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.