Granted Patent
Utility
US 5,631,440 · App. 08/606,224
Universal isolation member and non-electric detonator cap including the same
Inventors:
Gary R. Thureson, Eric R. Davis, Ernest L. Gladden, Alvaro Zappalorti
Patented Case
View Patent ↗
Granted: May 20, 1997
Filed: Feb 23, 1996
Inventors
Gary R. Thureson
Eric R. Davis
Ernest L. Gladden
Alvaro Zappalorti
Assignee (at issue)
The Ensign-Bickford Company
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.