Granted Patent
Utility
US 5,985,175 · App. 09/136,782
Boron oxide coated phosphor and method of making same
Inventors:
Chen-Wen Fan, Dale E. Benjamin, Franz Kummer, Charles F. Chenot, Richard G. W. Gingerich
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: Aug 19, 1998
Inventors
Chen-Wen Fan
Dale E. Benjamin
Franz Kummer
Charles F. Chenot
Richard G. W. Gingerich
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.