Granted Patent
Utility
US 4,723,592 · App. 06/909,196
Process for preparing foundry cores and molds
Inventors:
Robert A. Laitar, Eduardo Gmez
Patented Case
View Patent ↗
Granted: Feb 9, 1988
Filed: Sep 19, 1986
Inventors
Robert A. Laitar
Eduardo Gmez
Assignee (at issue)
Acme Resin Corp.
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.