Granted Patent
Utility
US 4,814,363 · App. 07/144,845
Phenolic resin compositions and their use in foundry binders
Inventor:
Colleen Marie Henry
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Jan 15, 1988
Inventor
Colleen Marie Henry
Assignee (at issue)
Ashland Oil, 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.