Granted Patent
Utility
US 5,656,199 · App. 08/727,103
Terbium or europium activated highly charged fluoropholopite phosphor
Inventors:
James R. Cox, Ronald E. Karam
Patented Case
View Patent ↗
Granted: Aug 12, 1997
Filed: Oct 8, 1996
Inventors
James R. Cox
Ronald E. Karam
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.