Granted Patent
Utility
US 4,336,342 · App. 06/244,521
Cost reduction of acid curing foundry binders with alkylated aromatic hydrocarbon solvents
Inventors:
William R. Dunnavant, Young D. Kim
Patented Case
View Patent ↗
Granted: Jun 22, 1982
Filed: Mar 16, 1981
Inventors
William R. Dunnavant
Young D. Kim
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.