Granted Patent
Utility
US 5,520,851 · App. 08/337,783
Iridium oxide film for electrochromic device
Inventors:
Phillip C. Yu, David L. Backfisch, Nada A. O'Brien, Bryant P. Hichwa
Patented Case
View Patent ↗
Granted: May 28, 1996
Filed: Nov 14, 1994
Inventors
Phillip C. Yu
David L. Backfisch
Nada A. O'Brien
Bryant P. Hichwa
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.