Granted Patent
Utility
US 4,902,580 · App. 07/260,647
Neutral reflecting coated articles with sputtered multilayer films of metal oxides
Inventor:
F. Howard Gillery
Patented Case
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Granted: Feb 20, 1990
Filed: Oct 21, 1988
Inventor
F. Howard Gillery
Assignee (at issue)
PPG Industries, 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.