Granted Patent
Utility
US 4,919,179 · App. 07/392,367
Water-in-oil emulsion explosive
Inventor:
Arun Chattopadhyay
Patented Case
View Patent ↗
Granted: Apr 24, 1990
Filed: Aug 11, 1989
Inventor
Arun Chattopadhyay
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.