Granted Patent
Utility
US 6,445,503 · App. 09/795,976
High durable, low-E, heat treatable layer coating system
Inventor:
Philip J. Lingle
Patented Case
View Patent ↗
Granted: Sep 3, 2002
Filed: Mar 1, 2001
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.