Granted Patent
Utility
US 4,608,394 · App. 06/818,311
Anti-static styrene polymer particles by impregnation
Inventor:
Alvin R. Ingram
Patented Case
View Patent ↗
Granted: Aug 26, 1986
Filed: Jan 13, 1986
Inventor
Alvin R. Ingram
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.