Granted Patent
Utility
US 6,113,808 · App. 09/215,481
Electroluminescent phosphor with extended life and method of making same
Inventors:
Richard G. W. Gingerich, Clarence D. Vanderpool
Patented Case
View Patent ↗
Granted: Sep 5, 2000
Filed: Dec 18, 1998
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.