Granted Patent
Utility
US 6,186,869 · App. 09/249,111
Cleaning using welding lances and blasting media
Inventors:
William MacFarlane, Steve Cherico, Dale R Miller
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Feb 12, 1999
Inventors
William MacFarlane
Steve Cherico
Dale R Miller
Assignee (at issue)
CE-TEK CO., LTD.
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.