Granted Patent
Utility
US 5,269,948 · App. 07/933,125
Decontamination of polystyrene
Inventor:
Charles M. Krutchen
Patented Case
View Patent ↗
Granted: Dec 14, 1993
Filed: Aug 21, 1992
Inventor
Charles M. Krutchen
Assignee (at issue)
Mobil Oil Corporation
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.