Granted Patent
Utility
US 4,789,693 · App. 07/090,803
Heat curable foundry mixes and binder compositions
Inventors:
Satish S. Jhaveri, William R. Dunnavant, Heimo J. Langer
Patented Case
View Patent ↗
Granted: Dec 6, 1988
Filed: Aug 28, 1987
Inventors
Satish S. Jhaveri
William R. Dunnavant
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.