Granted Patent
Utility
US 4,526,219 · App. 06/431,962
Process of forming foundry cores and molds utilizing binder curable by free radical polymerization
Inventors:
William R. Dunnavant, Heimo J. Langer, Grant O. Sedgwick
Patented Case
View Patent ↗
Granted: Jul 2, 1985
Filed: Sep 30, 1982
Inventors
William R. Dunnavant
Heimo J. Langer
Grant O. Sedgwick
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.