Granted Patent
Utility
US 4,737,207 · App. 06/940,353
Method for the preparation of a water-in-oil type emulsion explosive and an oxidizer composition for use in the method
Inventors:
Hans Ehrnstrom, Gunnar Ekman
Patented Case
View Patent ↗
Granted: Apr 12, 1988
Filed: Dec 11, 1986
Inventors
Hans Ehrnstrom
Gunnar Ekman
Assignee (at issue)
Nitro Nobel AB
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.