Granted Patent
Utility
US 6,686,043 · App. 09/690,222
Method for making long-life electroluminescent phosphor
Inventors:
Chen-Wen Fan, Richard G. W. Gingerich, Dale E. Benjamin
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Oct 17, 2000
Inventors
Chen-Wen Fan
Richard G. W. Gingerich
Dale E. Benjamin
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.