Granted Patent
Utility
US 4,781,983 · App. 07/144,906
Method for preparing antistatic expandable polystyrene
Inventor:
Susan G. Stickley
Patented Case
View Patent ↗
Granted: Nov 1, 1988
Filed: Jan 19, 1988
Inventor
Susan G. Stickley
Assignee (at issue)
Arco Chemical 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.