Granted Patent
Utility
US 4,768,865 · App. 07/060,543
Electrochromic window with metal grid counter electrode
Inventors:
Charles B. Greenberg, David E. Singleton
Patented Case
View Patent ↗
Granted: Sep 6, 1988
Filed: Jun 10, 1987
Inventors
Charles B. Greenberg
David E. Singleton
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.