Granted Patent
Utility
US 5,654,520 · App. 08/544,057
Delay charge and element, and detonator containing such a charge
Inventors:
Tore Boberg, Staffan Carlsson, Britt-Marie Ekman, Bo Karlsson
Patented Case
View Patent ↗
Granted: Aug 5, 1997
Filed: Oct 17, 1995
Inventors
Tore Boberg
Staffan Carlsson
Britt-Marie Ekman
Bo Karlsson
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.