Granted Patent
Utility
US 5,597,977 · App. 08/547,989
Hardened porous ammonium nitrate
Inventor:
Arun Chattopadhyay
Patented Case
View Patent ↗
Granted: Jan 28, 1997
Filed: Oct 25, 1995
Inventor
Arun Chattopadhyay
Assignee (at issue)
ICI Canada, Inc.
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.