Granted Patent
Utility
US 4,898,790 · App. 07/176,511
Low emissivity film for high temperature processing
Inventor:
James J. Finley
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Apr 1, 1988
Inventor
James J. Finley
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.