Granted Patent
Utility
US 4,622,346 · App. 06/802,901
Process for producing modified styrenic polymer beads for high strength foamed articles
Inventor:
Adolph V. DiGiulio
Patented Case
View Patent ↗
Granted: Nov 11, 1986
Filed: Nov 29, 1985
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.