Granted Patent
Utility
US 6,509,058 · App. 09/861,190
Moisture insensitive electroluminescent phosphor
Inventors:
Keith A. Klinedinst, Robert F. Clark
Patented Case
View Patent ↗
Granted: Jan 21, 2003
Filed: May 18, 2001
Inventors
Keith A. Klinedinst
Robert F. Clark
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.