Granted Patent
Utility
US 6,623,807 · App. 09/910,156
Stabilization of color in heated electroluminescent phosphor
Inventors:
Richard G. W. Gingerich, Clarence D. Vanderpool
Patented Case
View Patent ↗
Granted: Sep 23, 2003
Filed: Jul 20, 2001
Inventors
Richard G. W. Gingerich
Clarence D. Vanderpool
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.