Granted Patent
Utility
US 6,662,883 · App. 10/014,302
Charge tube assembly for a perforating gun
Inventor:
Ralf Bonkowski
Patented Case
View Patent ↗
Granted: Dec 16, 2003
Filed: Nov 13, 2001
Inventor
Ralf Bonkowski
Assignee (at issue)
LRI Oil Tools 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.