Granted Patent
Utility
US 5,390,727 · App. 08/179,649
Inorganic poundry binder systems and their uses
Inventors:
Yuily M. Yunovich, Ruth A. Dudenhoefer, Heimo J. Langer
Patented Case
View Patent ↗
Granted: Feb 21, 1995
Filed: Jan 7, 1994
Inventors
Yuily M. Yunovich
Ruth A. Dudenhoefer
Heimo J. Langer
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.