Granted Patent
Utility
US 5,269,966 · App. 07/999,634
Method of making zinc sulfide precursor material for a copper-activated zinc sulfide electroluminescent phosphor
Inventors:
Ronald E. Karam, Aaron Wold
Patented Case
View Patent ↗
Granted: Dec 14, 1993
Filed: Dec 31, 1992
Inventors
Ronald E. Karam
Aaron Wold
Assignee (at issue)
OSRAM SYLVANIA 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.