Granted Patent
Utility
US 4,303,783 · App. 06/146,923
Production of reflector beads from precursor beads for expandable polystyrene
Inventors:
Ronald A. Fava, Clarence E. Chaney
Patented Case
View Patent ↗
Granted: Dec 1, 1981
Filed: May 5, 1980
Inventors
Ronald A. Fava
Clarence E. Chaney
Assignee (at issue)
Arco Polymers, 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.