Granted Patent
Utility
US 6,321,690 · App. 09/394,377
Device, system and method for on-line explosive deslagging
Inventors:
Francis Zilka, Timothy Zilka, Kurt Prouty, Donald Howard, Christopher Scaringe, William Youngs
Patented Case
View Patent ↗
Granted: Nov 27, 2001
Filed: Sep 10, 1999
Inventors
Francis Zilka
Timothy Zilka
Kurt Prouty
Donald Howard
Christopher Scaringe
William Youngs
Assignee (at issue)
North American Industrial Services 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.