Granted Patent
Utility
US 4,424,285 · App. 06/495,185
Process for forming fast-cool vinyl aromatic expandable polymers
Inventor:
Adolph V. DiGiulio
Patented Case
View Patent ↗
Granted: Jan 3, 1984
Filed: May 16, 1983
Inventor
Adolph V. DiGiulio
Assignee (at issue)
Atlantic Richfield Company
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.