Granted Patent
Utility
US 4,529,028 · App. 06/492,813
Coating for molds and expendable cores
Inventors:
Charles J. Dybala, John J. Maczko
Patented Case
View Patent ↗
Granted: Jul 16, 1985
Filed: May 9, 1983
Inventors
Charles J. Dybala
John J. Maczko
Assignee (at issue)
Farley Metals, 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.