Granted Patent
Utility
US 5,616,285 · App. 08/646,781
Phosphor and method of making same
Inventor:
Yan Zhang
Patented Case
View Patent ↗
Granted: Apr 1, 1997
Filed: May 21, 1996
Inventor
Yan Zhang
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.