Granted Patent
Utility
US 5,621,036 · App. 08/391,038
Bound multi-component sand additive
Inventors:
Michael M. Geoffrey, Robert A. Laitar
Patented Case
View Patent ↗
Granted: Apr 15, 1997
Filed: Feb 21, 1995
Inventors
Michael M. Geoffrey
Robert A. Laitar
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.