Granted Patent
Utility
US 6,749,941 · App. 10/097,099
Insulating glass (IG) window unit including heat treatable coating with silicon-rich silicon nitride layer
Inventor:
Philip J. Lingle
Patented Case
View Patent ↗
Granted: Jun 15, 2004
Filed: Mar 14, 2002
Inventor
Philip J. Lingle
Assignee (at issue)
Guardian Industries Corp.
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.