Granted Patent
Utility
US 5,609,792 · App. 08/646,780
Phosphor and method of making same
Inventors:
James R. Cox, Ronald E. Karam
Patented Case
View Patent ↗
Granted: Mar 11, 1997
Filed: May 21, 1996
Inventors
James R. Cox
Ronald E. Karam
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.