Granted Patent
Utility
US 5,220,243 · App. 07/727,723
Moisture insensitive zinc sulfide electroluminescent materials and an electroluminescent device made therefrom
Inventors:
Keith A. Klinedinst, Richard A. Gary, Silvia E. Lichtensteiger
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Jul 10, 1991
Inventors
Keith A. Klinedinst
Richard A. Gary
Silvia E. Lichtensteiger
Assignee (at issue)
GTE Products Corporation
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.