Granted Patent
Utility
US 4,948,677 · App. 06/841,056
High transmittance, low emissivity article and method of preparation
Inventor:
F. Howard Gillery
Patented Case
View Patent ↗
Granted: Aug 14, 1990
Filed: Mar 17, 1986
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.