Granted Patent
Utility
US 6,770,221 · App. 10/367,036
Single-component white-emitting electroluminescent phosphor and method of making same
Inventors:
Xianzhong Chen, Robert L. Stevens
Patented Case
View Patent ↗
Granted: Aug 3, 2004
Filed: Feb 14, 2003
Inventors
Xianzhong Chen
Robert L. Stevens
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.