Granted Patent
Utility
US 5,286,517 · App. 07/927,617
A process for making an electroluminescent cell using a ZnS host including molecules of a ternary europium tetrafluoride compound
Inventors:
Dawon Kahng, T. Yoshioka
Patented Case
View Patent ↗
Granted: Feb 15, 1994
Filed: Aug 7, 1992
Inventors
Dawon Kahng
T. Yoshioka
Assignee (at issue)
NEC Research Institute, 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.