Granted Patent
Utility
US 4,938,890 · App. 07/481,550
Method of making YTaO.sub.4 :Nb phosphor with improved brightness using lithium chloride-lithium sulfate eutectic flux
Inventor:
Vaddi B. Reddy
Patented Case
View Patent ↗
Granted: Jul 3, 1990
Filed: Feb 20, 1990
Inventor
Vaddi B. Reddy
Assignee (at issue)
GTE Products Corporation
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.